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Diffstat (limited to 'etc/squid/squid.conf')
| -rw-r--r-- | etc/squid/squid.conf | 4953 |
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diff --git a/etc/squid/squid.conf b/etc/squid/squid.conf deleted file mode 100644 index 94870637..00000000 --- a/etc/squid/squid.conf +++ /dev/null @@ -1,4953 +0,0 @@ - -# WELCOME TO SQUID 2.7.STABLE9 -# ---------------------------- -# -# This is the default Squid configuration file. You may wish -# to look at the Squid home page (http://www.squid-cache.org/) -# for the FAQ and other documentation. -# -# The default Squid config file shows what the defaults for -# various options happen to be. If you don't need to change the -# default, you shouldn't uncomment the line. Doing so may cause -# run-time problems. In some cases "none" refers to no default -# setting at all, while in other cases it refers to a valid -# option - the comments for that keyword indicate if this is the -# case. -# - - -# Configuration options can be included using the "include" directive. -# Include takes a list of files to include. Quoting and wildcards is -# supported. -# -# For example, -# -# include /path/to/included/file/squid.acl.config -# -# Includes can be nested up to a hard-coded depth of 16 levels. -# This arbitrary restriction is to prevent recursive include references -# from causing Squid entering an infinite loop whilst trying to load -# configuration files. - - -# OPTIONS FOR AUTHENTICATION -# ----------------------------------------------------------------------------- - -# TAG: auth_param -# This is used to define parameters for the various authentication -# schemes supported by Squid. -# -# format: auth_param scheme parameter [setting] -# -# The order in which authentication schemes are presented to the client is -# dependent on the order the scheme first appears in config file. IE -# has a bug (it's not RFC 2617 compliant) in that it will use the basic -# scheme if basic is the first entry presented, even if more secure -# schemes are presented. For now use the order in the recommended -# settings section below. If other browsers have difficulties (don't -# recognize the schemes offered even if you are using basic) either -# put basic first, or disable the other schemes (by commenting out their -# program entry). -# -# Once an authentication scheme is fully configured, it can only be -# shutdown by shutting squid down and restarting. Changes can be made on -# the fly and activated with a reconfigure. I.E. You can change to a -# different helper, but not unconfigure the helper completely. -# -# Please note that while this directive defines how Squid processes -# authentication it does not automatically activate authentication. -# To use authentication you must in addition make use of ACLs based -# on login name in http_access (proxy_auth, proxy_auth_regex or -# external with %LOGIN used in the format tag). The browser will be -# challenged for authentication on the first such acl encountered -# in http_access processing and will also be re-challenged for new -# login credentials if the request is being denied by a proxy_auth -# type acl. -# -# WARNING: authentication can't be used in a transparently intercepting -# proxy as the client then thinks it is talking to an origin server and -# not the proxy. This is a limitation of bending the TCP/IP protocol to -# transparently intercepting port 80, not a limitation in Squid. -# -# === Parameters for the basic scheme follow. === -# -# "program" cmdline -# Specify the command for the external authenticator. Such a program -# reads a line containing "username password" and replies "OK" or -# "ERR" in an endless loop. "ERR" responses may optionally be followed -# by a error description available as %m in the returned error page. -# -# By default, the basic authentication scheme is not used unless a -# program is specified. -# -# If you want to use the traditional proxy authentication, jump over to -# the helpers/basic_auth/NCSA directory and type: -# % make -# % make install -# -# Then, set this line to something like -# -# auth_param basic program /usr/lib/squid/ncsa_auth /usr/etc/passwd -# -# "children" numberofchildren -# The number of authenticator processes to spawn. If you start too few -# squid will have to wait for them to process a backlog of credential -# verifications, slowing it down. When credential verifications are -# done via a (slow) network you are likely to need lots of -# authenticator processes. -# auth_param basic children 5 -# -# "concurrency" numberofconcurrentrequests -# The number of concurrent requests/channels the helper supports. -# Changes the protocol used to include a channel number first on -# the request/response line, allowing multiple requests to be sent -# to the same helper in parallell without wating for the response. -# Must not be set unless it's known the helper supports this. -# -# "realm" realmstring -# Specifies the realm name which is to be reported to the client for -# the basic proxy authentication scheme (part of the text the user -# will see when prompted their username and password). -# auth_param basic realm Squid proxy-caching web server -# -# "credentialsttl" timetolive -# Specifies how long squid assumes an externally validated -# username:password pair is valid for - in other words how often the -# helper program is called for that user. Set this low to force -# revalidation with short lived passwords. Note that setting this high -# does not impact your susceptibility to replay attacks unless you are -# using an one-time password system (such as SecureID). If you are using -# such a system, you will be vulnerable to replay attacks unless you -# also use the max_user_ip ACL in an http_access rule. -# auth_param basic credentialsttl 2 hours -# -# "casesensitive" on|off -# Specifies if usernames are case sensitive. Most user databases are -# case insensitive allowing the same username to be spelled using both -# lower and upper case letters, but some are case sensitive. This -# makes a big difference for user_max_ip ACL processing and similar. -# auth_param basic casesensitive off -# -# "blankpassword" on|off -# Specifies if blank passwords should be supported. Defaults to off -# as there is multiple authentication backends which handles blank -# passwords as "guest" access. -# -# === Parameters for the digest scheme follow === -# -# "program" cmdline -# Specify the command for the external authenticator. Such a program -# reads a line containing "username":"realm" and replies with the -# appropriate H(A1) value hex encoded or ERR if the user (or his H(A1) -# hash) does not exists. See RFC 2616 for the definition of H(A1). -# "ERR" responses may optionally be followed by a error description -# available as %m in the returned error page. -# -# By default, the digest authentication scheme is not used unless a -# program is specified. -# -# If you want to use a digest authenticator, jump over to the -# helpers/digest_auth/ directory and choose the authenticator to use. -# It it's directory type -# % make -# % make install -# -# Then, set this line to something like -# -# auth_param digest program /usr/lib/squid/digest_auth_pw /usr/etc/digpass -# -# "children" numberofchildren -# The number of authenticator processes to spawn. If you start too few -# squid will have to wait for them to process a backlog of credential -# verifications, slowing it down. When credential verifications are -# done via a (slow) network you are likely to need lots of -# authenticator processes. -# auth_param digest children 5 -# -# "concurrency" numberofconcurrentrequests -# The number of concurrent requests/channels the helper supports. -# Changes the protocol used to include a channel number first on -# the request/response line, allowing multiple requests to be sent -# to the same helper in parallell without wating for the response. -# Must not be set unless it's known the helper supports this. -# -# "realm" realmstring -# Specifies the realm name which is to be reported to the client for the -# digest proxy authentication scheme (part of the text the user will see -# when prompted their username and password). -# auth_param digest realm Squid proxy-caching web server -# -# "nonce_garbage_interval" timeinterval -# Specifies the interval that nonces that have been issued to clients are -# checked for validity. -# auth_param digest nonce_garbage_interval 5 minutes -# -# "nonce_max_duration" timeinterval -# Specifies the maximum length of time a given nonce will be valid for. -# auth_param digest nonce_max_duration 30 minutes -# -# "nonce_max_count" number -# Specifies the maximum number of times a given nonce can be used. -# auth_param digest nonce_max_count 50 -# -# "nonce_strictness" on|off -# Determines if squid requires strict increment-by-1 behavior for nonce -# counts, or just incrementing (off - for use when useragents generate -# nonce counts that occasionally miss 1 (ie, 1,2,4,6)). -# auth_param digest nonce_strictness off -# -# "check_nonce_count" on|off -# This directive if set to off can disable the nonce count check -# completely to work around buggy digest qop implementations in certain -# mainstream browser versions. Default on to check the nonce count to -# protect from authentication replay attacks. -# auth_param digest check_nonce_count on -# -# "post_workaround" on|off -# This is a workaround to certain buggy browsers who sends an incorrect -# request digest in POST requests when reusing the same nonce as acquired -# earlier in response to a GET request. -# auth_param digest post_workaround off -# -# === NTLM scheme options follow === -# -# "program" cmdline -# Specify the command for the external NTLM authenticator. Such a -# program participates in the NTLMSSP exchanges between Squid and the -# client and reads commands according to the Squid NTLMSSP helper -# protocol. See helpers/ntlm_auth/ for details. Recommended ntlm -# authenticator is ntlm_auth from Samba-3.X, but a number of other -# ntlm authenticators is available. -# -# By default, the ntlm authentication scheme is not used unless a -# program is specified. -# -# auth_param ntlm program /usr/bin/ntlm_auth --helper-protocol=squid-2.5-ntlmssp -# -# "children" numberofchildren -# The number of authenticator processes to spawn. If you start too few -# squid will have to wait for them to process a backlog of credential -# verifications, slowing it down. When credential verifications are -# done via a (slow) network you are likely to need lots of -# authenticator processes. -# auth_param ntlm children 5 -# -# "keep_alive" on|off -# This option enables the use of keep-alive on the initial -# authentication request. It has been reported some versions of MSIE -# have problems if this is enabled, but performance will be increased -# if enabled. -# -# auth_param ntlm keep_alive on -# -# === Negotiate scheme options follow === -# -# "program" cmdline -# Specify the command for the external Negotiate authenticator. Such a -# program participates in the SPNEGO exchanges between Squid and the -# client and reads commands according to the Squid ntlmssp helper -# protocol. See helpers/ntlm_auth/ for details. Recommended SPNEGO -# authenticator is ntlm_auth from Samba-4.X. -# -# By default, the Negotiate authentication scheme is not used unless a -# program is specified. -# -# auth_param negotiate program /path/to/samba/bin/ntlm_auth --helper-protocol=gss-spnego -# -# "children" numberofchildren -# The number of authenticator processes to spawn. If you start too few -# squid will have to wait for them to process a backlog of credential -# verifications, slowing it down. When credential verifications are -# done via a (slow) network you are likely to need lots of -# authenticator processes. -# auth_param negotiate children 5 -# -# "keep_alive" on|off -# If you experience problems with PUT/POST requests when using the -# Negotiate authentication scheme then you can try setting this to -# off. This will cause Squid to forcibly close the connection on -# the initial requests where the browser asks which schemes are -# supported by the proxy. -# -# auth_param negotiate keep_alive on -# -#Recommended minimum configuration per scheme: -#auth_param negotiate program <uncomment and complete this line to activate> -#auth_param negotiate children 5 -#auth_param negotiate keep_alive on -#auth_param ntlm program <uncomment and complete this line to activate> -#auth_param ntlm children 5 -#auth_param ntlm keep_alive on -#auth_param digest program <uncomment and complete this line> -#auth_param digest children 5 -#auth_param digest realm Squid proxy-caching web server -#auth_param digest nonce_garbage_interval 5 minutes -#auth_param digest nonce_max_duration 30 minutes -#auth_param digest nonce_max_count 50 -#auth_param basic program <uncomment and complete this line> -#auth_param basic children 5 -#auth_param basic realm Squid proxy-caching web server -#auth_param basic credentialsttl 2 hours -#auth_param basic casesensitive off - -# TAG: authenticate_cache_garbage_interval -# The time period between garbage collection across the username cache. -# This is a tradeoff between memory utilization (long intervals - say -# 2 days) and CPU (short intervals - say 1 minute). Only change if you -# have good reason to. -# -#Default: -# authenticate_cache_garbage_interval 1 hour - -# TAG: authenticate_ttl -# The time a user & their credentials stay in the logged in user cache -# since their last request. When the garbage interval passes, all user -# credentials that have passed their TTL are removed from memory. -# -#Default: -# authenticate_ttl 1 hour - -# TAG: authenticate_ip_ttl -# If you use proxy authentication and the 'max_user_ip' ACL, this -# directive controls how long Squid remembers the IP addresses -# associated with each user. Use a small value (e.g., 60 seconds) if -# your users might change addresses quickly, as is the case with -# dialups. You might be safe using a larger value (e.g., 2 hours) in a -# corporate LAN environment with relatively static address assignments. -# -#Default: -# authenticate_ip_ttl 0 seconds - -# TAG: authenticate_ip_shortcircuit_ttl -# Cache authentication credentials per client IP address for this -# long. Default is 0 seconds (disabled). -# -# See also authenticate_ip_shortcircuit_access directive. -# -#Default: -# authenticate_ip_shortcircuit_ttl 0 seconds - - -# ACCESS CONTROLS -# ----------------------------------------------------------------------------- - -# TAG: external_acl_type -# This option defines external acl classes using a helper program to -# look up the status -# -# external_acl_type name [options] FORMAT.. /path/to/helper [helper arguments..] -# -# Options: -# -# ttl=n TTL in seconds for cached results (defaults to 3600 -# for 1 hour) -# negative_ttl=n -# TTL for cached negative lookups (default same -# as ttl) -# children=n number of processes spawn to service external acl -# lookups of this type. (default 5). -# concurrency=n concurrency level per process. Only used with helpers -# capable of processing more than one query at a time. -# Note: see compatibility note below -# cache=n result cache size, 0 is unbounded (default) -# grace= Percentage remaining of TTL where a refresh of a -# cached entry should be initiated without needing to -# wait for a new reply. (default 0 for no grace period) -# protocol=2.5 Compatibility mode for Squid-2.5 external acl helpers -# -# FORMAT specifications -# -# %LOGIN Authenticated user login name -# %EXT_USER Username from external acl -# %IDENT Ident user name -# %SRC Client IP -# %SRCPORT Client source port -# %URI Requested URI -# %DST Requested host -# %PROTO Requested protocol -# %PORT Requested port -# %METHOD Request method -# %MYADDR Squid interface address -# %MYPORT Squid http_port number -# %PATH Requested URL-path (including query-string if any) -# %USER_CERT SSL User certificate in PEM format -# %USER_CERTCHAIN SSL User certificate chain in PEM format -# %USER_CERT_xx SSL User certificate subject attribute xx -# %USER_CA_xx SSL User certificate issuer attribute xx -# %{Header} HTTP request header "Header" -# %{Hdr:member} HTTP request header "Hdr" list member "member" -# %{Hdr:;member} -# HTTP request header list member using ; as -# list separator. ; can be any non-alphanumeric -# character. -# %ACL The ACL name -# %DATA The ACL arguments. If not used then any arguments -# is automatically added at the end -# -# In addition to the above, any string specified in the referencing -# acl will also be included in the helper request line, after the -# specified formats (see the "acl external" directive) -# -# The helper receives lines per the above format specification, -# and returns lines starting with OK or ERR indicating the validity -# of the request and optionally followed by additional keywords with -# more details. -# -# General result syntax: -# -# OK/ERR keyword=value ... -# -# Defined keywords: -# -# user= The users name (login also understood) -# password= The users password (for PROXYPASS login= cache_peer) -# message= Error message or similar used as %o in error messages -# (error also understood) -# log= String to be logged in access.log. Available as -# %ea in logformat specifications -# -# If protocol=3.0 (the default) then URL escaping is used to protect -# each value in both requests and responses. -# -# If using protocol=2.5 then all values need to be enclosed in quotes -# if they may contain whitespace, or the whitespace escaped using \. -# And quotes or \ characters within the keyword value must be \ escaped. -# -# When using the concurrency= option the protocol is changed by -# introducing a query channel tag infront of the request/response. -# The query channel tag is a number between 0 and concurrency-1. -# -# Compatibility Note: The children= option was named concurrency= in -# Squid-2.5.STABLE3 and earlier, and was accepted as an alias for the -# duration of the Squid-2.5 releases to keep compatibility. However, -# the meaning of concurrency= option has changed in Squid-2.6 to match -# that of Squid-3 and the old syntax no longer works. -# -#Default: -# none - -# TAG: acl -# Defining an Access List -# -# Every access list definition must begin with an aclname and acltype, -# followed by either type-specific arguments or a quoted filename that -# they are read from. -# -# acl aclname acltype argument ... -# acl aclname acltype "file" ... -# -# when using "file", the file should contain one item per line. -# -# By default, regular expressions are CASE-SENSITIVE. To make -# them case-insensitive, use the -i option. -# -# acl aclname src ip-address/netmask ... (clients IP address) -# acl aclname src addr1-addr2/netmask ... (range of addresses) -# acl aclname dst ip-address/netmask ... (URL host's IP address) -# acl aclname myip ip-address/netmask ... (local socket IP address) -# -# acl aclname arp mac-address ... (xx:xx:xx:xx:xx:xx notation) -# # The arp ACL requires the special configure option --enable-arp-acl. -# # Furthermore, the arp ACL code is not portable to all operating systems. -# # It works on Linux, Solaris, FreeBSD and some other *BSD variants. -# # -# # NOTE: Squid can only determine the MAC address for clients that are on -# # the same subnet. If the client is on a different subnet, then Squid cannot -# # find out its MAC address. -# -# acl aclname srcdomain .foo.com ... # reverse lookup, client IP -# acl aclname dstdomain .foo.com ... # Destination server from URL -# acl aclname srcdom_regex [-i] xxx ... # regex matching client name -# acl aclname dstdom_regex [-i] xxx ... # regex matching server -# # For dstdomain and dstdom_regex a reverse lookup is tried if a IP -# # based URL is used and no match is found. The name "none" is used -# # if the reverse lookup fails. -# -# acl aclname time [day-abbrevs] [h1:m1-h2:m2] -# # day-abbrevs: -# # S - Sunday -# # M - Monday -# # T - Tuesday -# # W - Wednesday -# # H - Thursday -# # F - Friday -# # A - Saturday -# # h1:m1 must be less than h2:m2 -# acl aclname url_regex [-i] ^http:// ... # regex matching on whole URL -# acl aclname urlpath_regex [-i] \.gif$ ... # regex matching on URL path -# acl aclname urllogin [-i] [^a-zA-Z0-9] ... # regex matching on URL login field -# acl aclname port 80 70 21 ... -# acl aclname port 0-1024 ... # ranges allowed -# acl aclname myport 3128 ... # (local socket TCP port) -# acl aclname myportname 3128 ... # http(s)_port name -# acl aclname proto HTTP FTP ... -# acl aclname method GET POST ... -# acl aclname browser [-i] regexp ... -# # pattern match on User-Agent header (see also req_header below) -# acl aclname referer_regex [-i] regexp ... -# # pattern match on Referer header -# # Referer is highly unreliable, so use with care -# acl aclname ident username ... -# acl aclname ident_regex [-i] pattern ... -# # string match on ident output. -# # use REQUIRED to accept any non-null ident. -# acl aclname src_as number ... -# acl aclname dst_as number ... -# # Except for access control, AS numbers can be used for -# # routing of requests to specific caches. Here's an -# # example for routing all requests for AS#1241 and only -# # those to mycache.mydomain.net: -# # acl asexample dst_as 1241 -# # cache_peer_access mycache.mydomain.net allow asexample -# # cache_peer_access mycache_mydomain.net deny all -# -# acl aclname proxy_auth [-i] username ... -# acl aclname proxy_auth_regex [-i] pattern ... -# # list of valid usernames -# # use REQUIRED to accept any valid username. -# # -# # NOTE: when a Proxy-Authentication header is sent but it is not -# # needed during ACL checking the username is NOT logged -# # in access.log. -# # -# # NOTE: proxy_auth requires a EXTERNAL authentication program -# # to check username/password combinations (see -# # auth_param directive). -# # -# # NOTE: proxy_auth can't be used in a transparent proxy as -# # the browser needs to be configured for using a proxy in order -# # to respond to proxy authentication. -# -# acl aclname snmp_community string ... -# # A community string to limit access to your SNMP Agent -# # Example: -# # -# # acl snmppublic snmp_community public -# -# acl aclname maxconn number -# # This will be matched when the client's IP address has -# # more than <number> HTTP connections established. -# -# acl aclname max_user_ip [-s] number -# # This will be matched when the user attempts to log in from more -# # than <number> different ip addresses. The authenticate_ip_ttl -# # parameter controls the timeout on the ip entries. -# # If -s is specified the limit is strict, denying browsing -# # from any further IP addresses until the ttl has expired. Without -# # -s Squid will just annoy the user by "randomly" denying requests. -# # (the counter is reset each time the limit is reached and a -# # request is denied) -# # NOTE: in acceleration mode or where there is mesh of child proxies, -# # clients may appear to come from multiple addresses if they are -# # going through proxy farms, so a limit of 1 may cause user problems. -# -# acl aclname req_mime_type mime-type ... -# # regex match against the mime type of the request generated -# # by the client. Can be used to detect file upload or some -# # types HTTP tunneling requests. -# # NOTE: This does NOT match the reply. You cannot use this -# # to match the returned file type. -# -# acl aclname req_header header-name [-i] any\.regex\.here -# # regex match against any of the known request headers. May be -# # thought of as a superset of "browser", "referer" and "mime-type" -# # ACLs. -# -# acl aclname rep_mime_type mime-type ... -# # regex match against the mime type of the reply received by -# # squid. Can be used to detect file download or some -# # types HTTP tunneling requests. -# # NOTE: This has no effect in http_access rules. It only has -# # effect in rules that affect the reply data stream such as -# # http_reply_access. -# -# acl aclname rep_header header-name [-i] any\.regex\.here -# # regex match against any of the known reply headers. May be -# # thought of as a superset of "browser", "referer" and "mime-type" -# # ACLs. -# # -# # Example: -# # -# # acl many_spaces rep_header Content-Disposition -i [[:space:]]{3,} -# -# acl aclname external class_name [arguments...] -# # external ACL lookup via a helper class defined by the -# # external_acl_type directive. -# -# acl aclname urlgroup group1 ... -# # match against the urlgroup as indicated by redirectors -# -# acl aclname user_cert attribute values... -# # match against attributes in a user SSL certificate -# # attribute is one of DN/C/O/CN/L/ST -# -# acl aclname ca_cert attribute values... -# # match against attributes a users issuing CA SSL certificate -# # attribute is one of DN/C/O/CN/L/ST -# -# acl aclname ext_user username ... -# acl aclname ext_user_regex [-i] pattern ... -# # string match on username returned by external acl helper -# # use REQUIRED to accept any non-null user name. -# -#Examples: -#acl macaddress arp 09:00:2b:23:45:67 -#acl myexample dst_as 1241 -#acl password proxy_auth REQUIRED -#acl fileupload req_mime_type -i ^multipart/form-data$ -#acl javascript rep_mime_type -i ^application/x-javascript$ -# -#Recommended minimum configuration: -acl all src all -acl manager proto cache_object -acl localhost src 127.0.0.1/32 -acl to_localhost dst 127.0.0.0/8 0.0.0.0/32 -# -# Example rule allowing access from your local networks. -# Adapt to list your (internal) IP networks from where browsing -# should be allowed -acl localnet src 10.0.0.0/8 # RFC1918 possible internal network -acl localnet src 172.16.0.0/12 # RFC1918 possible internal network -acl localnet src 192.168.0.0/16 # RFC1918 possible internal network -# -acl SSL_ports port 443 # https -acl SSL_ports port 563 # snews -acl SSL_ports port 873 # rsync -acl Safe_ports port 80 # http -acl Safe_ports port 21 # ftp -acl Safe_ports port 443 # https -acl Safe_ports port 70 # gopher -acl Safe_ports port 210 # wais -acl Safe_ports port 1025-65535 # unregistered ports -acl Safe_ports port 280 # http-mgmt -acl Safe_ports port 488 # gss-http -acl Safe_ports port 591 # filemaker -acl Safe_ports port 777 # multiling http -acl Safe_ports port 631 # cups -acl Safe_ports port 873 # rsync -acl Safe_ports port 901 # SWAT -acl purge method PURGE -acl CONNECT method CONNECT - -# TAG: http_access -# Allowing or Denying access based on defined access lists -# -# Access to the HTTP port: -# http_access allow|deny [!]aclname ... -# -# NOTE on default values: -# -# If there are no "access" lines present, the default is to deny -# the request. -# -# If none of the "access" lines cause a match, the default is the -# opposite of the last line in the list. If the last line was -# deny, the default is allow. Conversely, if the last line -# is allow, the default will be deny. For these reasons, it is a -# good idea to have an "deny all" or "allow all" entry at the end -# of your access lists to avoid potential confusion. -# -#Default: -# http_access deny all -# -#Recommended minimum configuration: -# -# Only allow cachemgr access from localhost -http_access allow manager localhost -http_access deny manager -# Only allow purge requests from localhost -http_access allow purge localhost -http_access deny purge -# Deny requests to unknown ports -http_access deny !Safe_ports -# Deny CONNECT to other than SSL ports -http_access deny CONNECT !SSL_ports -# -# We strongly recommend the following be uncommented to protect innocent -# web applications running on the proxy server who think the only -# one who can access services on "localhost" is a local user -#http_access deny to_localhost -# -# INSERT YOUR OWN RULE(S) HERE TO ALLOW ACCESS FROM YOUR CLIENTS - -# Example rule allowing access from your local networks. -# Adapt localnet in the ACL section to list your (internal) IP networks -# from where browsing should be allowed -#http_access allow localnet -http_access allow localhost - -# And finally deny all other access to this proxy -http_access deny all - -# TAG: http_access2 -# Allowing or Denying access based on defined access lists -# -# Identical to http_access, but runs after redirectors. If not set -# then only http_access is used. -# -#Default: -# none - -# TAG: http_reply_access -# Allow replies to client requests. This is complementary to http_access. -# -# http_reply_access allow|deny [!] aclname ... -# -# NOTE: if there are no access lines present, the default is to allow -# all replies -# -# If none of the access lines cause a match the opposite of the -# last line will apply. Thus it is good practice to end the rules -# with an "allow all" or "deny all" entry. -# -#Default: -# http_reply_access allow all - -# TAG: icp_access -# Allowing or Denying access to the ICP port based on defined -# access lists -# -# icp_access allow|deny [!]aclname ... -# -# See http_access for details -# -#Default: -# icp_access deny all -# -#Allow ICP queries from local networks only -icp_access allow localnet -icp_access deny all - -# TAG: htcp_access -# Allowing or Denying access to the HTCP port based on defined -# access lists -# -# htcp_access allow|deny [!]aclname ... -# -# See http_access for details -# -# NOTE: The default if no htcp_access lines are present is to -# deny all traffic. This default may cause problems with peers -# using the htcp or htcp-oldsquid options. -# -#Default: -# htcp_access deny all -# -#Allow HTCP queries from local networks only -# htcp_access allow localnet -# htcp_access deny all - -# TAG: htcp_clr_access -# Allowing or Denying access to purge content using HTCP based -# on defined access lists -# -# htcp_clr_access allow|deny [!]aclname ... -# -# See http_access for details -# -##Allow HTCP CLR requests from trusted peers -#acl htcp_clr_peer src 172.16.1.2 -#htcp_clr_access allow htcp_clr_peer -# -#Default: -# htcp_clr_access deny all - -# TAG: miss_access -# Use to force your neighbors to use you as a sibling instead of -# a parent. For example: -# -# acl localclients src 172.16.0.0/16 -# miss_access allow localclients -# miss_access deny !localclients -# -# This means only your local clients are allowed to fetch -# MISSES and all other clients can only fetch HITS. -# -# By default, allow all clients who passed the http_access rules -# to fetch MISSES from us. -# -#Default setting: -# miss_access allow all - -# TAG: ident_lookup_access -# A list of ACL elements which, if matched, cause an ident -# (RFC931) lookup to be performed for this request. For -# example, you might choose to always perform ident lookups -# for your main multi-user Unix boxes, but not for your Macs -# and PCs. By default, ident lookups are not performed for -# any requests. -# -# To enable ident lookups for specific client addresses, you -# can follow this example: -# -# acl ident_aware_hosts src 198.168.1.0/255.255.255.0 -# ident_lookup_access allow ident_aware_hosts -# ident_lookup_access deny all -# -# Only src type ACL checks are fully supported. A src_domain -# ACL might work at times, but it will not always provide -# the correct result. -# -#Default: -# ident_lookup_access deny all - -# TAG: reply_body_max_size bytes deny acl acl... -# This option specifies the maximum size of a reply body in bytes. -# It can be used to prevent users from downloading very large files, -# such as MP3's and movies. When the reply headers are received, -# the reply_body_max_size lines are processed, and the first line with -# a result of "deny" is used as the maximum body size for this reply. -# This size is checked twice. First when we get the reply headers, -# we check the content-length value. If the content length value exists -# and is larger than the allowed size, the request is denied and the -# user receives an error message that says "the request or reply -# is too large." If there is no content-length, and the reply -# size exceeds this limit, the client's connection is just closed -# and they will receive a partial reply. -# -# WARNING: downstream caches probably can not detect a partial reply -# if there is no content-length header, so they will cache -# partial responses and give them out as hits. You should NOT -# use this option if you have downstream caches. -# -# If you set this parameter to zero (the default), there will be -# no limit imposed. -# -#Default: -# reply_body_max_size 0 allow all - -# TAG: authenticate_ip_shortcircuit_access -# Access list determining when shortcicuiting the authentication process -# based on source IP cached credentials is acceptable. Use this to deny -# using the ip auth cache on requests from child proxies or other source -# ip's having multiple users. -# -# See also authenticate_ip_shortcircuit_ttl directive -# -#Default: -# none - - -# OPTIONS FOR X-Forwarded-For -# ----------------------------------------------------------------------------- - -# TAG: follow_x_forwarded_for -# Allowing or Denying the X-Forwarded-For header to be followed to -# find the original source of a request. -# -# Requests may pass through a chain of several other proxies -# before reaching us. The X-Forwarded-For header will contain a -# comma-separated list of the IP addresses in the chain, with the -# rightmost address being the most recent. -# -# If a request reaches us from a source that is allowed by this -# configuration item, then we consult the X-Forwarded-For header -# to see where that host received the request from. If the -# X-Forwarded-For header contains multiple addresses, and if -# acl_uses_indirect_client is on, then we continue backtracking -# until we reach an address for which we are not allowed to -# follow the X-Forwarded-For header, or until we reach the first -# address in the list. (If acl_uses_indirect_client is off, then -# it's impossible to backtrack through more than one level of -# X-Forwarded-For addresses.) -# -# The end result of this process is an IP address that we will -# refer to as the indirect client address. This address may -# be treated as the client address for access control, delay -# pools and logging, depending on the acl_uses_indirect_client, -# delay_pool_uses_indirect_client and log_uses_indirect_client -# options. -# -# SECURITY CONSIDERATIONS: -# -# Any host for which we follow the X-Forwarded-For header -# can place incorrect information in the header, and Squid -# will use the incorrect information as if it were the -# source address of the request. This may enable remote -# hosts to bypass any access control restrictions that are -# based on the client's source addresses. -# -# For example: -# -# acl localhost src 127.0.0.1 -# acl my_other_proxy srcdomain .proxy.example.com -# follow_x_forwarded_for allow localhost -# follow_x_forwarded_for allow my_other_proxy -# -#Default: -# follow_x_forwarded_for deny all - -# TAG: acl_uses_indirect_client on|off -# Controls whether the indirect client address -# (see follow_x_forwarded_for) is used instead of the -# direct client address in acl matching. -# -#Default: -# acl_uses_indirect_client on - -# TAG: delay_pool_uses_indirect_client on|off -# Controls whether the indirect client address -# (see follow_x_forwarded_for) is used instead of the -# direct client address in delay pools. -# -#Default: -# delay_pool_uses_indirect_client on - -# TAG: log_uses_indirect_client on|off -# Controls whether the indirect client address -# (see follow_x_forwarded_for) is used instead of the -# direct client address in the access log. -# -#Default: -# log_uses_indirect_client on - - -# SSL OPTIONS -# ----------------------------------------------------------------------------- - -# TAG: ssl_unclean_shutdown -# Note: This option is only available if Squid is rebuilt with the -# --enable-ssl option -# -# Some browsers (especially MSIE) bugs out on SSL shutdown -# messages. -# -#Default: -# ssl_unclean_shutdown off - -# TAG: ssl_engine -# Note: This option is only available if Squid is rebuilt with the -# --enable-ssl option -# -# The OpenSSL engine to use. You will need to set this if you -# would like to use hardware SSL acceleration for example. -# -#Default: -# none - -# TAG: sslproxy_client_certificate -# Note: This option is only available if Squid is rebuilt with the -# --enable-ssl option -# -# Client SSL Certificate to use when proxying https:// URLs -# -#Default: -# none - -# TAG: sslproxy_client_key -# Note: This option is only available if Squid is rebuilt with the -# --enable-ssl option -# -# Client SSL Key to use when proxying https:// URLs -# -#Default: -# none - -# TAG: sslproxy_version -# Note: This option is only available if Squid is rebuilt with the -# --enable-ssl option -# -# SSL version level to use when proxying https:// URLs -# -#Default: -# sslproxy_version 1 - -# TAG: sslproxy_options -# Note: This option is only available if Squid is rebuilt with the -# --enable-ssl option -# -# SSL engine options to use when proxying https:// URLs -# -#Default: -# none - -# TAG: sslproxy_cipher -# Note: This option is only available if Squid is rebuilt with the -# --enable-ssl option -# -# SSL cipher list to use when proxying https:// URLs -# -#Default: -# none - -# TAG: sslproxy_cafile -# Note: This option is only available if Squid is rebuilt with the -# --enable-ssl option -# -# file containing CA certificates to use when verifying server -# certificates while proxying https:// URLs -# -#Default: -# none - -# TAG: sslproxy_capath -# Note: This option is only available if Squid is rebuilt with the -# --enable-ssl option -# -# directory containing CA certificates to use when verifying -# server certificates while proxying https:// URLs -# -#Default: -# none - -# TAG: sslproxy_flags -# Note: This option is only available if Squid is rebuilt with the -# --enable-ssl option -# -# Various flags modifying the use of SSL while proxying https:// URLs: -# DONT_VERIFY_PEER Accept certificates even if they fail to -# verify. -# NO_DEFAULT_CA Don't use the default CA list built in -# to OpenSSL. -# -#Default: -# none - -# TAG: sslpassword_program -# Note: This option is only available if Squid is rebuilt with the -# --enable-ssl option -# -# Specify a program used for entering SSL key passphrases -# when using encrypted SSL certificate keys. If not specified -# keys must either be unencrypted, or Squid started with the -N -# option to allow it to query interactively for the passphrase. -# -#Default: -# none - - -# NETWORK OPTIONS -# ----------------------------------------------------------------------------- - -# TAG: http_port -# Usage: port [options] -# hostname:port [options] -# 1.2.3.4:port [options] -# -# The socket addresses where Squid will listen for HTTP client -# requests. You may specify multiple socket addresses. -# There are three forms: port alone, hostname with port, and -# IP address with port. If you specify a hostname or IP -# address, Squid binds the socket to that specific -# address. This replaces the old 'tcp_incoming_address' -# option. Most likely, you do not need to bind to a specific -# address, so you can use the port number alone. -# -# If you are running Squid in accelerator mode, you -# probably want to listen on port 80 also, or instead. -# -# The -I command line option will override the *first* port -# specified here. -# -# You may specify multiple socket addresses on multiple lines. -# -# Options: -# -# transparent Support for transparent interception of -# outgoing requests without browser settings. -# -# tproxy Support Linux TPROXY for spoofing outgoing -# connections using the client IP address. -# -# accel Accelerator mode. See also the related vhost, -# vport and defaultsite directives. -# -# defaultsite=domainname -# What to use for the Host: header if it is not present -# in a request. Determines what site (not origin server) -# accelerators should consider the default. -# Defaults to visible_hostname:port if not set -# May be combined with vport=NN to override the port number. -# Implies accel. -# -# vhost Accelerator mode using Host header for virtual -# domain support. Implies accel. -# -# vport Accelerator with IP based virtual host support. -# Implies accel. -# -# vport=NN As above, but uses specified port number rather -# than the http_port number. Implies accel. -# -# allow-direct Allow direct forwarding in accelerator mode. Normally -# accelerated requests is denied direct forwarding as it -# never_direct was used. -# -# urlgroup= Default urlgroup to mark requests with (see -# also acl urlgroup and url_rewrite_program) -# -# protocol= Protocol to reconstruct accelerated requests with. -# Defaults to http. -# -# no-connection-auth -# Prevent forwarding of Microsoft connection oriented -# authentication (NTLM, Negotiate and Kerberos) -# -# act-as-origin -# Act is if this Squid is the origin server. -# This currently means generate own Date: and -# Expires: headers. Implies accel. -# -# http11 Enables HTTP/1.1 support to clients. The HTTP/1.1 -# support is still incomplete with an internal HTTP/1.0 -# hop, but should work with most clients. The main -# HTTP/1.1 features missing due to this is forwarding -# of requests using chunked transfer encoding (results -# in 411) and forwarding of 1xx responses (silently -# dropped) -# -# name= Specifies a internal name for the port. Defaults to -# the port specification (port or addr:port) -# -# tcpkeepalive[=idle,interval,timeout] -# Enable TCP keepalive probes of idle connections -# idle is the initial time before TCP starts probing -# the connection, interval how often to probe, and -# timeout the time before giving up. -# -# If you run Squid on a dual-homed machine with an internal -# and an external interface we recommend you to specify the -# internal address:port in http_port. This way Squid will only be -# visible on the internal address. -# -# Squid normally listens to port 3128 -http_port 3128 - -# TAG: https_port -# Note: This option is only available if Squid is rebuilt with the -# --enable-ssl option -# -# Usage: [ip:]port cert=certificate.pem [key=key.pem] [options...] -# -# The socket address where Squid will listen for HTTPS client -# requests. -# -# This is really only useful for situations where you are running -# squid in accelerator mode and you want to do the SSL work at the -# accelerator level. -# -# You may specify multiple socket addresses on multiple lines, -# each with their own SSL certificate and/or options. -# -# Options: -# -# In addition to the options specified for http_port the folling -# SSL related options is supported: -# -# cert= Path to SSL certificate (PEM format). -# -# key= Path to SSL private key file (PEM format) -# if not specified, the certificate file is -# assumed to be a combined certificate and -# key file. -# -# version= The version of SSL/TLS supported -# 1 automatic (default) -# 2 SSLv2 only -# 3 SSLv3 only -# 4 TLSv1 only -# -# cipher= Colon separated list of supported ciphers. -# -# options= Various SSL engine options. The most important -# being: -# NO_SSLv2 Disallow the use of SSLv2 -# NO_SSLv3 Disallow the use of SSLv3 -# NO_TLSv1 Disallow the use of TLSv1 -# SINGLE_DH_USE Always create a new key when using -# temporary/ephemeral DH key exchanges -# See src/ssl_support.c or OpenSSL SSL_CTX_set_options -# documentation for a complete list of options. -# -# clientca= File containing the list of CAs to use when -# requesting a client certificate. -# -# cafile= File containing additional CA certificates to -# use when verifying client certificates. If unset -# clientca will be used. -# -# capath= Directory containing additional CA certificates -# and CRL lists to use when verifying client certificates. -# -# crlfile= File of additional CRL lists to use when verifying -# the client certificate, in addition to CRLs stored in -# the capath. Implies VERIFY_CRL flag below. -# -# dhparams= File containing DH parameters for temporary/ephemeral -# DH key exchanges. -# -# sslflags= Various flags modifying the use of SSL: -# DELAYED_AUTH -# Don't request client certificates -# immediately, but wait until acl processing -# requires a certificate (not yet implemented). -# NO_DEFAULT_CA -# Don't use the default CA lists built in -# to OpenSSL. -# NO_SESSION_REUSE -# Don't allow for session reuse. Each connection -# will result in a new SSL session. -# VERIFY_CRL -# Verify CRL lists when accepting client -# certificates. -# VERIFY_CRL_ALL -# Verify CRL lists for all certificates in the -# client certificate chain. -# -# sslcontext= SSL session ID context identifier. -# -# -#Default: -# none - -# TAG: tcp_outgoing_tos -# Allows you to select a TOS/Diffserv value to mark outgoing -# connections with, based on the username or source address -# making the request. -# -# tcp_outgoing_tos ds-field [!]aclname ... -# -# Example where normal_service_net uses the TOS value 0x00 -# and good_service_net uses 0x20 -# -# acl normal_service_net src 10.0.0.0/255.255.255.0 -# acl good_service_net src 10.0.1.0/255.255.255.0 -# tcp_outgoing_tos 0x00 normal_service_net -# tcp_outgoing_tos 0x20 good_service_net -# -# TOS/DSCP values really only have local significance - so you should -# know what you're specifying. For more information, see RFC2474 and -# RFC3260. -# -# The TOS/DSCP byte must be exactly that - a octet value 0 - 255, or -# "default" to use whatever default your host has. Note that in -# practice often only values 0 - 63 is usable as the two highest bits -# have been redefined for use by ECN (RFC3168). -# -# Processing proceeds in the order specified, and stops at first fully -# matching line. -# -# Note: The use of this directive using client dependent ACLs is -# incompatible with the use of server side persistent connections. To -# ensure correct results it is best to set server_persisten_connections -# to off when using this directive in such configurations. -# -#Default: -# none - -# TAG: tcp_outgoing_address -# Allows you to map requests to different outgoing IP addresses -# based on the username or source address of the user making -# the request. -# -# tcp_outgoing_address ipaddr [[!]aclname] ... -# -# Example where requests from 10.0.0.0/24 will be forwarded -# with source address 10.1.0.1, 10.0.2.0/24 forwarded with -# source address 10.1.0.2 and the rest will be forwarded with -# source address 10.1.0.3. -# -# acl normal_service_net src 10.0.0.0/24 -# acl good_service_net src 10.0.1.0/24 10.0.2.0/24 -# tcp_outgoing_address 10.1.0.1 normal_service_net -# tcp_outgoing_address 10.1.0.2 good_service_net -# tcp_outgoing_address 10.1.0.3 -# -# Processing proceeds in the order specified, and stops at first fully -# matching line. -# -# Note: The use of this directive using client dependent ACLs is -# incompatible with the use of server side persistent connections. To -# ensure correct results it is best to set server_persistent_connections -# to off when using this directive in such configurations. -# -#Default: -# none - -# TAG: zph_mode -# This option enables packet level marking of HIT/MISS responses, -# either using IP TOS or socket priority. -# off Feature disabled -# tos Set the IP TOS/Diffserv field -# priority Set the socket priority (may get mapped to TOS by OS, -# otherwise only usable in local rulesets) -# option Embed the mark in an IP option field. See also -# zph_option. -# -# See also tcp_outgoing_tos for details/requirements about TOS usage. -# -#Default: -# zph_mode off - -# TAG: zph_local -# Allows you to select a TOS/Diffserv/Priority value to mark local hits. -# Default: 0 (disabled). -# -#Default: -# zph_local 0 - -# TAG: zph_sibling -# Allows you to select a TOS/Diffserv/Priority value to mark sibling hits. -# Default: 0 (disabled). -# -#Default: -# zph_sibling 0 - -# TAG: zph_parent -# Allows you to select a TOS/Diffserv/Priority value to mark parent hits. -# Default: 0 (disabled). -# -#Default: -# zph_parent 0 - -# TAG: zph_option -# The IP option to use when zph_mode is set to "option". Defaults to -# 136 which is officially registered as "SATNET Stream ID". -# -#Default: -# zph_option 136 - - -# OPTIONS WHICH AFFECT THE NEIGHBOR SELECTION ALGORITHM -# ----------------------------------------------------------------------------- - -# TAG: cache_peer -# To specify other caches in a hierarchy, use the format: -# -# cache_peer hostname type http-port icp-port [options] -# -# For example, -# -# # proxy icp -# # hostname type port port options -# # -------------------- -------- ----- ----- ----------- -# cache_peer parent.foo.net parent 3128 3130 proxy-only default -# cache_peer sib1.foo.net sibling 3128 3130 proxy-only -# cache_peer sib2.foo.net sibling 3128 3130 proxy-only -# -# type: either 'parent', 'sibling', or 'multicast'. -# -# proxy-port: The port number where the cache listens for proxy -# requests. -# -# icp-port: Used for querying neighbor caches about -# objects. To have a non-ICP neighbor -# specify '7' for the ICP port and make sure the -# neighbor machine has the UDP echo port -# enabled in its /etc/inetd.conf file. -# NOTE: Also requires icp_port option enabled to send/receive -# requests via this method. -# -# options: proxy-only -# weight=n -# ttl=n -# no-query -# default -# round-robin -# carp -# multicast-responder -# multicast-siblings -# closest-only -# no-digest -# no-netdb-exchange -# no-delay -# login=user:password | PASS | *:password -# connect-timeout=nn -# digest-url=url -# allow-miss -# max-conn=n -# htcp -# htcp-oldsquid -# originserver -# userhash -# sourcehash -# name=xxx -# monitorurl=url -# monitorsize=sizespec -# monitorinterval=seconds -# monitortimeout=seconds -# forceddomain=name -# ssl -# sslcert=/path/to/ssl/certificate -# sslkey=/path/to/ssl/key -# sslversion=1|2|3|4 -# sslcipher=... -# ssloptions=... -# front-end-https[=on|auto] -# connection-auth[=on|off|auto] -# idle=n -# http11 -# -# use 'proxy-only' to specify objects fetched -# from this cache should not be saved locally. -# -# use 'weight=n' to affect the selection of a peer -# during any weighted peer-selection mechanisms. -# The weight must be an integer; default is 1, -# larger weights are favored more. -# This option does not affect parent selection if a peering -# protocol is not in use. -# -# use 'ttl=n' to specify a IP multicast TTL to use -# when sending an ICP queries to this address. -# Only useful when sending to a multicast group. -# Because we don't accept ICP replies from random -# hosts, you must configure other group members as -# peers with the 'multicast-responder' option below. -# -# use 'no-query' to NOT send ICP queries to this -# neighbor. -# -# use 'default' if this is a parent cache which can -# be used as a "last-resort" if a peer cannot be located -# by any of the peer-selection mechanisms. -# If specified more than once, only the first is used. -# -# use 'round-robin' to define a set of parents which -# should be used in a round-robin fashion in the -# absence of any ICP queries. -# -# use 'carp' to define a set of parents which should -# be used as a CARP array. The requests will be -# distributed among the parents based on the CARP load -# balancing hash function based on their weight. -# -# 'multicast-responder' indicates the named peer -# is a member of a multicast group. ICP queries will -# not be sent directly to the peer, but ICP replies -# will be accepted from it. -# -# the 'multicast-siblings' option is meant to be used -# only for cache peers of type "multicast". It instructs -# Squid that ALL members of this multicast group have -# "sibling" relationship with it, not "parent". This is -# an optimization that avoids useless multicast queries -# to a multicast group when the requested object would -# be fetched only from a "parent" cache, anyway. It's -# useful, e.g., when configuring a pool of redundant -# Squid proxies, being members of the same -# multicast group. -# -# 'closest-only' indicates that, for ICP_OP_MISS -# replies, we'll only forward CLOSEST_PARENT_MISSes -# and never FIRST_PARENT_MISSes. -# -# use 'no-digest' to NOT request cache digests from -# this neighbor. -# -# 'no-netdb-exchange' disables requesting ICMP -# RTT database (NetDB) from the neighbor. -# -# use 'no-delay' to prevent access to this neighbor -# from influencing the delay pools. -# -# use 'login=user:password' if this is a personal/workgroup -# proxy and your parent requires proxy authentication. -# Note: The string can include URL escapes (i.e. %20 for -# spaces). This also means % must be written as %%. -# -# use 'login=PASS' if users must authenticate against -# the upstream proxy or in the case of a reverse proxy -# configuration, the origin web server. This will pass -# the users credentials as they are to the peer. -# Note: To combine this with local authentication the Basic -# authentication scheme must be used, and both servers must -# share the same user database as HTTP only allows for -# a single login (one for proxy, one for origin server). -# Also be warned this will expose your users proxy -# password to the peer. USE WITH CAUTION -# -# use 'login=*:password' to pass the username to the -# upstream cache, but with a fixed password. This is meant -# to be used when the peer is in another administrative -# domain, but it is still needed to identify each user. -# The star can optionally be followed by some extra -# information which is added to the username. This can -# be used to identify this proxy to the peer, similar to -# the login=username:password option above. -# -# use 'connect-timeout=nn' to specify a peer -# specific connect timeout (also see the -# peer_connect_timeout directive) -# -# use 'digest-url=url' to tell Squid to fetch the cache -# digest (if digests are enabled) for this host from -# the specified URL rather than the Squid default -# location. -# -# use 'allow-miss' to disable Squid's use of only-if-cached -# when forwarding requests to siblings. This is primarily -# useful when icp_hit_stale is used by the sibling. To -# extensive use of this option may result in forwarding -# loops, and you should avoid having two-way peerings -# with this option. (for example to deny peer usage on -# requests from peer by denying cache_peer_access if the -# source is a peer) -# -# use 'max-conn=n' to limit the amount of connections Squid -# may open to this peer. -# -# use 'htcp' to send HTCP, instead of ICP, queries -# to the neighbor. You probably also want to -# set the "icp port" to 4827 instead of 3130. -# You must also allow this Squid htcp_access and -# http_access in the peer Squid configuration. -# -# use 'htcp-oldsquid' to send HTCP to old Squid versions -# You must also allow this Squid htcp_access and -# http_access in the peer Squid configuration. -# -# 'originserver' causes this parent peer to be contacted as -# a origin server. Meant to be used in accelerator setups. -# -# use 'userhash' to load-balance amongst a set of parents -# based on the client proxy_auth or ident username. -# -# use 'sourcehash' to load-balance amongst a set of parents -# based on the client source ip. -# -# use 'name=xxx' if you have multiple peers on the same -# host but different ports. This name can be used to -# differentiate the peers in cache_peer_access and similar -# directives. -# -# use 'monitorurl=url' to have periodically request a given -# URL from the peer, and only consider the peer as alive -# if this monitoring is successful (default none) -# -# use 'monitorsize=min[-max]' to limit the size range of -# 'monitorurl' replies considered valid. Defaults to 0 to -# accept any size replies as valid. -# -# use 'monitorinterval=seconds' to change frequency of -# how often the peer is monitored with 'monitorurl' -# (default 300 for a 5 minute interval). If set to 0 -# then monitoring is disabled even if a URL is defined. -# -# use 'monitortimeout=seconds' to change the timeout of -# 'monitorurl'. Defaults to 'monitorinterval'. -# -# use 'forceddomain=name' to forcibly set the Host header -# of requests forwarded to this peer. Useful in accelerator -# setups where the server (peer) expects a certain domain -# name and using redirectors to feed this domain name -# is not feasible. -# -# use 'ssl' to indicate connections to this peer should -# be SSL/TLS encrypted. -# -# use 'sslcert=/path/to/ssl/certificate' to specify a client -# SSL certificate to use when connecting to this peer. -# -# use 'sslkey=/path/to/ssl/key' to specify the private SSL -# key corresponding to sslcert above. If 'sslkey' is not -# specified 'sslcert' is assumed to reference a -# combined file containing both the certificate and the key. -# -# use sslversion=1|2|3|4 to specify the SSL version to use -# when connecting to this peer -# 1 = automatic (default) -# 2 = SSL v2 only -# 3 = SSL v3 only -# 4 = TLS v1 only -# -# use sslcipher=... to specify the list of valid SSL ciphers -# to use when connecting to this peer. -# -# use ssloptions=... to specify various SSL engine options: -# NO_SSLv2 Disallow the use of SSLv2 -# NO_SSLv3 Disallow the use of SSLv3 -# NO_TLSv1 Disallow the use of TLSv1 -# See src/ssl_support.c or the OpenSSL documentation for -# a more complete list. -# -# use sslcafile=... to specify a file containing -# additional CA certificates to use when verifying the -# peer certificate. -# -# use sslcapath=... to specify a directory containing -# additional CA certificates to use when verifying the -# peer certificate. -# -# use sslcrlfile=... to specify a certificate revocation -# list file to use when verifying the peer certificate. -# -# use sslflags=... to specify various flags modifying the -# SSL implementation: -# DONT_VERIFY_PEER -# Accept certificates even if they fail to -# verify. -# NO_DEFAULT_CA -# Don't use the default CA list built in -# to OpenSSL. -# -# use ssldomain= to specify the peer name as advertised -# in it's certificate. Used for verifying the correctness -# of the received peer certificate. If not specified the -# peer hostname will be used. -# -# use front-end-https to enable the "Front-End-Https: On" -# header needed when using Squid as a SSL frontend in front -# of Microsoft OWA. See MS KB document Q307347 for details -# on this header. If set to auto the header will -# only be added if the request is forwarded as a https:// -# URL. -# -# use connection-auth=off to tell Squid that this peer does -# not support Microsoft connection oriented authentication, -# and any such challenges received from there should be -# ignored. Default is auto to automatically determine the -# status of the peer. -# -# use idle=n to specify a minimum number of idle connections -# that should be kept open to this peer. -# -# use http11 to send requests using HTTP/1.1 to this peer. -# Note: The HTTP/1.1 support is still incomplete, with an -# internal HTTP/1.0 hop. As result 1xx responses will not -# be forwarded. -# -#Default: -# none - -# TAG: cache_peer_domain -# Use to limit the domains for which a neighbor cache will be -# queried. Usage: -# -# cache_peer_domain cache-host domain [domain ...] -# cache_peer_domain cache-host !domain -# -# For example, specifying -# -# cache_peer_domain parent.foo.net .edu -# -# has the effect such that UDP query packets are sent to -# 'bigserver' only when the requested object exists on a -# server in the .edu domain. Prefixing the domain name -# with '!' means the cache will be queried for objects -# NOT in that domain. -# -# NOTE: * Any number of domains may be given for a cache-host, -# either on the same or separate lines. -# * When multiple domains are given for a particular -# cache-host, the first matched domain is applied. -# * Cache hosts with no domain restrictions are queried -# for all requests. -# * There are no defaults. -# * There is also a 'cache_peer_access' tag in the ACL -# section. -# -#Default: -# none - -# TAG: cache_peer_access -# Similar to 'cache_peer_domain' but provides more flexibility by -# using ACL elements. -# -# cache_peer_access cache-host allow|deny [!]aclname ... -# -# The syntax is identical to 'http_access' and the other lists of -# ACL elements. See the comments for 'http_access' below, or -# the Squid FAQ (http://www.squid-cache.org/FAQ/FAQ-10.html). -# -#Default: -# none - -# TAG: neighbor_type_domain -# usage: neighbor_type_domain neighbor parent|sibling domain domain ... -# -# Modifying the neighbor type for specific domains is now -# possible. You can treat some domains differently than the the -# default neighbor type specified on the 'cache_peer' line. -# Normally it should only be necessary to list domains which -# should be treated differently because the default neighbor type -# applies for hostnames which do not match domains listed here. -# -#EXAMPLE: -# cache_peer cache.foo.org parent 3128 3130 -# neighbor_type_domain cache.foo.org sibling .com .net -# neighbor_type_domain cache.foo.org sibling .au .de -# -#Default: -# none - -# TAG: dead_peer_timeout (seconds) -# This controls how long Squid waits to declare a peer cache -# as "dead." If there are no ICP replies received in this -# amount of time, Squid will declare the peer dead and not -# expect to receive any further ICP replies. However, it -# continues to send ICP queries, and will mark the peer as -# alive upon receipt of the first subsequent ICP reply. -# -# This timeout also affects when Squid expects to receive ICP -# replies from peers. If more than 'dead_peer' seconds have -# passed since the last ICP reply was received, Squid will not -# expect to receive an ICP reply on the next query. Thus, if -# your time between requests is greater than this timeout, you -# will see a lot of requests sent DIRECT to origin servers -# instead of to your parents. -# -#Default: -# dead_peer_timeout 10 seconds - -# TAG: hierarchy_stoplist -# A list of words which, if found in a URL, cause the object to -# be handled directly by this cache. In other words, use this -# to not query neighbor caches for certain objects. You may -# list this option multiple times. Note: never_direct overrides -# this option. -#We recommend you to use at least the following line. -hierarchy_stoplist cgi-bin ? - - -# MEMORY CACHE OPTIONS -# ----------------------------------------------------------------------------- - -# TAG: cache_mem (bytes) -# NOTE: THIS PARAMETER DOES NOT SPECIFY THE MAXIMUM PROCESS SIZE. -# IT ONLY PLACES A LIMIT ON HOW MUCH ADDITIONAL MEMORY SQUID WILL -# USE AS A MEMORY CACHE OF OBJECTS. SQUID USES MEMORY FOR OTHER -# THINGS AS WELL. SEE THE SQUID FAQ SECTION 8 FOR DETAILS. -# -# 'cache_mem' specifies the ideal amount of memory to be used -# for: -# * In-Transit objects -# * Hot Objects -# * Negative-Cached objects -# -# Data for these objects are stored in 4 KB blocks. This -# parameter specifies the ideal upper limit on the total size of -# 4 KB blocks allocated. In-Transit objects take the highest -# priority. -# -# In-transit objects have priority over the others. When -# additional space is needed for incoming data, negative-cached -# and hot objects will be released. In other words, the -# negative-cached and hot objects will fill up any unused space -# not needed for in-transit objects. -# -# If circumstances require, this limit will be exceeded. -# Specifically, if your incoming request rate requires more than -# 'cache_mem' of memory to hold in-transit objects, Squid will -# exceed this limit to satisfy the new requests. When the load -# decreases, blocks will be freed until the high-water mark is -# reached. Thereafter, blocks will be used to store hot -# objects. -# -#Default: -# cache_mem 8 MB - -# TAG: maximum_object_size_in_memory (bytes) -# Objects greater than this size will not be attempted to kept in -# the memory cache. This should be set high enough to keep objects -# accessed frequently in memory to improve performance whilst low -# enough to keep larger objects from hoarding cache_mem. -# -#Default: -# maximum_object_size_in_memory 8 KB - -# TAG: memory_replacement_policy -# The memory replacement policy parameter determines which -# objects are purged from memory when memory space is needed. -# -# See cache_replacement_policy for details. -# -#Default: -# memory_replacement_policy lru - - -# DISK CACHE OPTIONS -# ----------------------------------------------------------------------------- - -# TAG: cache_replacement_policy -# The cache replacement policy parameter determines which -# objects are evicted (replaced) when disk space is needed. -# -# lru : Squid's original list based LRU policy -# heap GDSF : Greedy-Dual Size Frequency -# heap LFUDA: Least Frequently Used with Dynamic Aging -# heap LRU : LRU policy implemented using a heap -# -# Applies to any cache_dir lines listed below this. -# -# The LRU policies keeps recently referenced objects. -# -# The heap GDSF policy optimizes object hit rate by keeping smaller -# popular objects in cache so it has a better chance of getting a -# hit. It achieves a lower byte hit rate than LFUDA though since -# it evicts larger (possibly popular) objects. -# -# The heap LFUDA policy keeps popular objects in cache regardless of -# their size and thus optimizes byte hit rate at the expense of -# hit rate since one large, popular object will prevent many -# smaller, slightly less popular objects from being cached. -# -# Both policies utilize a dynamic aging mechanism that prevents -# cache pollution that can otherwise occur with frequency-based -# replacement policies. -# -# NOTE: if using the LFUDA replacement policy you should increase -# the value of maximum_object_size above its default of 4096 KB to -# to maximize the potential byte hit rate improvement of LFUDA. -# -# For more information about the GDSF and LFUDA cache replacement -# policies see http://www.hpl.hp.com/techreports/1999/HPL-1999-69.html -# and http://fog.hpl.external.hp.com/techreports/98/HPL-98-173.html. -# -#Default: -# cache_replacement_policy lru - -# TAG: cache_dir -# Usage: -# -# cache_dir Type Directory-Name Fs-specific-data [options] -# -# You can specify multiple cache_dir lines to spread the -# cache among different disk partitions. -# -# Type specifies the kind of storage system to use. Only "ufs" -# is built by default. To enable any of the other storage systems -# see the --enable-storeio configure option. -# -# 'Directory' is a top-level directory where cache swap -# files will be stored. If you want to use an entire disk -# for caching, this can be the mount-point directory. -# The directory must exist and be writable by the Squid -# process. Squid will NOT create this directory for you. -# Only using COSS, a raw disk device or a stripe file can -# be specified, but the configuration of the "cache_swap_log" -# tag is mandatory. -# -# The ufs store type: -# -# "ufs" is the old well-known Squid storage format that has always -# been there. -# -# cache_dir ufs Directory-Name Mbytes L1 L2 [options] -# -# 'Mbytes' is the amount of disk space (MB) to use under this -# directory. The default is 100 MB. Change this to suit your -# configuration. Do NOT put the size of your disk drive here. -# Instead, if you want Squid to use the entire disk drive, -# subtract 20% and use that value. -# -# 'Level-1' is the number of first-level subdirectories which -# will be created under the 'Directory'. The default is 16. -# -# 'Level-2' is the number of second-level subdirectories which -# will be created under each first-level directory. The default -# is 256. -# -# The aufs store type: -# -# "aufs" uses the same storage format as "ufs", utilizing -# POSIX-threads to avoid blocking the main Squid process on -# disk-I/O. This was formerly known in Squid as async-io. -# -# cache_dir aufs Directory-Name Mbytes L1 L2 [options] -# -# see argument descriptions under ufs above -# -# The diskd store type: -# -# "diskd" uses the same storage format as "ufs", utilizing a -# separate process to avoid blocking the main Squid process on -# disk-I/O. -# -# cache_dir diskd Directory-Name Mbytes L1 L2 [options] [Q1=n] [Q2=n] -# -# see argument descriptions under ufs above -# -# Q1 specifies the number of unacknowledged I/O requests when Squid -# stops opening new files. If this many messages are in the queues, -# Squid won't open new files. Default is 64 -# -# Q2 specifies the number of unacknowledged messages when Squid -# starts blocking. If this many messages are in the queues, -# Squid blocks until it receives some replies. Default is 72 -# -# When Q1 < Q2 (the default), the cache directory is optimized -# for lower response time at the expense of a decrease in hit -# ratio. If Q1 > Q2, the cache directory is optimized for -# higher hit ratio at the expense of an increase in response -# time. -# -# The coss store type: -# -# block-size=n defines the "block size" for COSS cache_dir's. -# Squid uses file numbers as block numbers. Since file numbers -# are limited to 24 bits, the block size determines the maximum -# size of the COSS partition. The default is 512 bytes, which -# leads to a maximum cache_dir size of 512<<24, or 8 GB. Note -# you should not change the COSS block size after Squid -# has written some objects to the cache_dir. -# -# overwrite-percent=n defines the percentage of disk that COSS -# must write to before a given object will be moved to the -# current stripe. A value of "n" closer to 100 will cause COSS -# to waste less disk space by having multiple copies of an object -# on disk, but will increase the chances of overwriting a popular -# object as COSS overwrites stripes. A value of "n" close to 0 -# will cause COSS to keep all current objects in the current COSS -# stripe at the expense of the hit rate. The default value of 50 -# will allow any given object to be stored on disk a maximum of -# 2 times. -# -# max-stripe-waste=n defines the maximum amount of space that COSS -# will waste in a given stripe (in bytes). When COSS writes data -# to disk, it will potentially waste up to "max-size" worth of disk -# space for each 1MB of data written. If "max-size" is set to a -# large value (ie >256k), this could potentially result in large -# amounts of wasted disk space. Setting this value to a lower value -# (ie 64k or 32k) will result in a COSS disk refusing to cache -# larger objects until the COSS stripe has been filled to within -# "max-stripe-waste" of the maximum size (1MB). -# -# membufs=n defines the number of "memory-only" stripes that COSS -# will use. When an cache hit is performed on a COSS stripe before -# COSS has reached the overwrite-percent value for that object, -# COSS will use a series of memory buffers to hold the object in -# while the data is sent to the client. This will define the maximum -# number of memory-only buffers that COSS will use. The default value -# is 10, which will use a maximum of 10MB of memory for buffers. -# -# maxfullbufs=n defines the maximum number of stripes a COSS partition -# will have in memory waiting to be freed (either because the disk is -# under load and the stripe is unwritten, or because clients are still -# transferring data from objects using the memory). In order to try -# and maintain a good hit rate under load, COSS will reserve the last -# 2 full stripes for object hits. (ie a COSS cache_dir will reject -# new objects when the number of full stripes is 2 less than maxfullbufs) -# -# The null store type: -# -# no options are allowed or required -# -# Common options: -# -# no-store, no new objects should be stored to this cache_dir -# -# min-size=n, refers to the min object size this storedir will accept. -# It's used to restrict a storedir to only store large objects -# (e.g. aufs) while other storedirs are optimized for smaller objects -# (e.g. COSS). Defaults to 0. -# -# max-size=n, refers to the max object size this storedir supports. -# It is used to initially choose the storedir to dump the object. -# Note: To make optimal use of the max-size limits you should order -# the cache_dir lines with the smallest max-size value first and the -# ones with no max-size specification last. -# -# Note that for coss, max-size must be less than COSS_MEMBUF_SZ -# (hard coded at 1 MB). -# -#Default: -cache_dir ufs /var/spool/squid 16384 16 1024 - -# TAG: store_dir_select_algorithm -# Set this to 'round-robin' as an alternative. -# -#Default: -# store_dir_select_algorithm least-load - -# TAG: max_open_disk_fds -# To avoid having disk as the I/O bottleneck Squid can optionally -# bypass the on-disk cache if more than this amount of disk file -# descriptors are open. -# -# A value of 0 indicates no limit. -# -#Default: -# max_open_disk_fds 0 - -# TAG: minimum_object_size (bytes) -# Objects smaller than this size will NOT be saved on disk. The -# value is specified in kilobytes, and the default is 0 KB, which -# means there is no minimum. -# -#Default: -# minimum_object_size 0 KB - -# TAG: maximum_object_size (bytes) -# Objects larger than this size will NOT be saved on disk. The -# value is specified in kilobytes, and the default is 4MB. If -# you wish to get a high BYTES hit ratio, you should probably -# increase this (one 32 MB object hit counts for 3200 10KB -# hits). If you wish to increase speed more than your want to -# save bandwidth you should leave this low. -# -# NOTE: if using the LFUDA replacement policy you should increase -# this value to maximize the byte hit rate improvement of LFUDA! -# See replacement_policy below for a discussion of this policy. -# -# NOTE 2: In Debian the default is raised to 20MB allowing cache -# of Packages files in debian repositories. This makes squid a -# proper proxy for APT. -# -#Default: -#NOTE 3: raised to 150 MB -maximum_object_size 153600 KB - -# TAG: cache_swap_low (percent, 0-100) -# TAG: cache_swap_high (percent, 0-100) -# -# The low- and high-water marks for cache object replacement. -# Replacement begins when the swap (disk) usage is above the -# low-water mark and attempts to maintain utilization near the -# low-water mark. As swap utilization gets close to high-water -# mark object eviction becomes more aggressive. If utilization is -# close to the low-water mark less replacement is done each time. -# -# Defaults are 90% and 95%. If you have a large cache, 5% could be -# hundreds of MB. If this is the case you may wish to set these -# numbers closer together. -# -#Default: -# cache_swap_low 90 -# cache_swap_high 95 - -# TAG: update_headers on|off -# By default Squid updates stored HTTP headers when receiving -# a 304 response. Set this to off if you want to disable this -# for disk I/O performance reasons. Disabling this VIOLATES the -# HTTP standard, and could make you liable for problems which it -# causes. -# -#Default: -# update_headers on - - -# LOGFILE OPTIONS -# ----------------------------------------------------------------------------- - -# TAG: logformat -# Usage: -# -# logformat <name> <format specification> -# -# Defines an access log format. -# -# The <format specification> is a string with embedded % format codes -# -# % format codes all follow the same basic structure where all but -# the formatcode is optional. Output strings are automatically escaped -# as required according to their context and the output format -# modifiers are usually not needed, but can be specified if an explicit -# output format is desired. -# -# % ["|[|'|#] [-] [[0]width] [{argument}] formatcode -# -# " output in quoted string format -# [ output in squid text log format as used by log_mime_hdrs -# # output in URL quoted format -# ' output as-is -# -# - left aligned -# width field width. If starting with 0 the -# output is zero padded -# {arg} argument such as header name etc -# -# Format codes: -# -# >a Client source IP address -# >A Client FQDN -# >p Client source port -# <A Server IP address or peer name -# la Local IP address (http_port) -# lp Local port number (http_port) -# oa Our outgoing IP address (tcp_outgoing_address) -# ts Seconds since epoch -# tu subsecond time (milliseconds) -# tl Local time. Optional strftime format argument -# default %d/%b/%Y:%H:%M:%S %z -# tg GMT time. Optional strftime format argument -# default %d/%b/%Y:%H:%M:%S %z -# tr Response time (milliseconds) -# >h Request header. Optional header name argument -# on the format header[:[separator]element] -# <h Reply header. Optional header name argument -# as for >h -# un User name -# ul User name from authentication -# ui User name from ident -# us User name from SSL -# ue User name from external acl helper -# Hs HTTP status code -# Ss Squid request status (TCP_MISS etc) -# Sh Squid hierarchy status (DEFAULT_PARENT etc) -# mt MIME content type -# rm Request method (GET/POST etc) -# ru Request URL -# rp Request URL-Path excluding hostname -# rv Request protocol version -# ea Log string returned by external acl -# <st Reply size including HTTP headers -# >st Request size including HTTP headers -# st Request+Reply size including HTTP headers -# sn Unique sequence number per log line entry -# % a literal % character -# -# The default formats available (which do not need re-defining) are: -# -#logformat squid %ts.%03tu %6tr %>a %Ss/%03Hs %<st %rm %ru %un %Sh/%<A %mt -#logformat squidmime %ts.%03tu %6tr %>a %Ss/%03Hs %<st %rm %ru %un %Sh/%<A %mt [%>h] [%<h] -#logformat common %>a %ui %un [%tl] "%rm %ru HTTP/%rv" %Hs %<st %Ss:%Sh -#logformat combined %>a %ui %un [%tl] "%rm %ru HTTP/%rv" %Hs %<st "%{Referer}>h" "%{User-Agent}>h" %Ss:%Sh -# -#Default: -# none - -# TAG: access_log -# These files log client request activities. Has a line every HTTP or -# ICP request. The format is: -# access_log <filepath> [<logformat name> [acl acl ...]] -# access_log none [acl acl ...]] -# -# Will log to the specified file using the specified format (which -# must be defined in a logformat directive) those entries which match -# ALL the acl's specified (which must be defined in acl clauses). -# If no acl is specified, all requests will be logged to this file. -# -# To disable logging of a request use the filepath "none", in which case -# a logformat name should not be specified. -# -# To log the request via syslog specify a filepath of "syslog": -# -# access_log syslog[:facility.priority] [format [acl1 [acl2 ....]]] -# where facility could be any of: -# authpriv, daemon, local0 .. local7 or user. -# -# And priority could be any of: -# err, warning, notice, info, debug. -access_log /var/log/squid/access.log squid - -# TAG: log_access allow|deny acl acl... -# This options allows you to control which requests gets logged -# to access.log (see access_log directive). Requests denied for -# logging will also not be accounted for in performance counters. -# -#Default: -# none - -# TAG: logfile_daemon -# Specify the path to the logfile-writing daemon. This daemon is -# used to write the access and store logs, if configured. -# -#Default: -# logfile_daemon /usr/lib/squid/logfile-daemon - -# TAG: cache_log -# Cache logging file. This is where general information about -# your cache's behavior goes. You can increase the amount of data -# logged to this file with the "debug_options" tag below. -# -#Default: -# cache_log /var/log/squid/cache.log - -# TAG: cache_store_log -# Logs the activities of the storage manager. Shows which -# objects are ejected from the cache, and which objects are -# saved and for how long. To disable, enter "none". There are -# not really utilities to analyze this data, so you can safely -# disable it. -# -#Default: -# cache_store_log /var/log/squid/store.log - -# TAG: cache_swap_state -# Location for the cache "swap.state" file. This index file holds -# the metadata of objects saved on disk. It is used to rebuild -# the cache during startup. Normally this file resides in each -# 'cache_dir' directory, but you may specify an alternate -# pathname here. Note you must give a full filename, not just -# a directory. Since this is the index for the whole object -# list you CANNOT periodically rotate it! -# -# If %s can be used in the file name it will be replaced with a -# a representation of the cache_dir name where each / is replaced -# with '.'. This is needed to allow adding/removing cache_dir -# lines when cache_swap_log is being used. -# -# If have more than one 'cache_dir', and %s is not used in the name -# these swap logs will have names such as: -# -# cache_swap_log.00 -# cache_swap_log.01 -# cache_swap_log.02 -# -# The numbered extension (which is added automatically) -# corresponds to the order of the 'cache_dir' lines in this -# configuration file. If you change the order of the 'cache_dir' -# lines in this file, these index files will NOT correspond to -# the correct 'cache_dir' entry (unless you manually rename -# them). We recommend you do NOT use this option. It is -# better to keep these index files in each 'cache_dir' directory. -# -#Default: -# none - -# TAG: logfile_rotate -# Specifies the number of logfile rotations to make when you -# type 'squid -k rotate'. The default is 10, which will rotate -# with extensions 0 through 9. Setting logfile_rotate to 0 will -# disable the file name rotation, but the logfiles are still closed -# and re-opened. This will enable you to rename the logfiles -# yourself just before sending the rotate signal. -# -# Note, the 'squid -k rotate' command normally sends a USR1 -# signal to the running squid process. In certain situations -# (e.g. on Linux with Async I/O), USR1 is used for other -# purposes, so -k rotate uses another signal. It is best to get -# in the habit of using 'squid -k rotate' instead of 'kill -USR1 -# <pid>'. -# -# Note2, for Debian/Linux the default of logfile_rotate is -# zero, since it includes external logfile-rotation methods. -# -#Default: -# logfile_rotate 0 - -# TAG: emulate_httpd_log on|off -# The Cache can emulate the log file format which many 'httpd' -# programs use. To disable/enable this emulation, set -# emulate_httpd_log to 'off' or 'on'. The default -# is to use the native log format since it includes useful -# information Squid-specific log analyzers use. -# -#Default: -# emulate_httpd_log off - -# TAG: log_ip_on_direct on|off -# Log the destination IP address in the hierarchy log tag when going -# direct. Earlier Squid versions logged the hostname here. If you -# prefer the old way set this to off. -# -#Default: -# log_ip_on_direct on - -# TAG: mime_table -# Pathname to Squid's MIME table. You shouldn't need to change -# this, but the default file contains examples and formatting -# information if you do. -# -#Default: -# mime_table /usr/share/squid/mime.conf - -# TAG: log_mime_hdrs on|off -# The Cache can record both the request and the response MIME -# headers for each HTTP transaction. The headers are encoded -# safely and will appear as two bracketed fields at the end of -# the access log (for either the native or httpd-emulated log -# formats). To enable this logging set log_mime_hdrs to 'on'. -# -#Default: -# log_mime_hdrs off - -# TAG: useragent_log -# Squid will write the User-Agent field from HTTP requests -# to the filename specified here. By default useragent_log -# is disabled. -# -#Default: -# none - -# TAG: referer_log -# Squid will write the Referer field from HTTP requests to the -# filename specified here. By default referer_log is disabled. -# Note that "referer" is actually a misspelling of "referrer" -# however the misspelt version has been accepted into the HTTP RFCs -# and we accept both. -# -#Default: -# none - -# TAG: pid_filename -# A filename to write the process-id to. To disable, enter "none". -# -#Default: -# pid_filename /var/run/squid.pid - -# TAG: debug_options -# Logging options are set as section,level where each source file -# is assigned a unique section. Lower levels result in less -# output, Full debugging (level 9) can result in a very large -# log file, so be careful. The magic word "ALL" sets debugging -# levels for all sections. We recommend normally running with -# "ALL,1". -# -#Default: -# debug_options ALL,1 - -# TAG: log_fqdn on|off -# Turn this on if you wish to log fully qualified domain names -# in the access.log. To do this Squid does a DNS lookup of all -# IP's connecting to it. This can (in some situations) increase -# latency, which makes your cache seem slower for interactive -# browsing. -# -#Default: -# log_fqdn off - -# TAG: client_netmask -# A netmask for client addresses in logfiles and cachemgr output. -# Change this to protect the privacy of your cache clients. -# A netmask of 255.255.255.0 will log all IP's in that range with -# the last digit set to '0'. -# -#Default: -# client_netmask 255.255.255.255 - -# TAG: forward_log -# Note: This option is only available if Squid is rebuilt with the -# --enable-forward-log option -# -# Logs the server-side requests. -# -# This is currently work in progress. -# -#Default: -# none - -# TAG: strip_query_terms -# By default, Squid strips query terms from requested URLs before -# logging. This protects your user's privacy. -# -#Default: -# strip_query_terms on - -# TAG: buffered_logs on|off -# cache.log log file is written with stdio functions, and as such -# it can be buffered or unbuffered. By default it will be unbuffered. -# Buffering it can speed up the writing slightly (though you are -# unlikely to need to worry unless you run with tons of debugging -# enabled in which case performance will suffer badly anyway..). -# -#Default: -# buffered_logs off - -# TAG: netdb_filename -# A filename where Squid stores it's netdb state between restarts. -# To disable, enter "none". -# -#Default: -# netdb_filename /var/spool/squid/logs/netdb.state - - -# OPTIONS FOR FTP GATEWAYING -# ----------------------------------------------------------------------------- - -# TAG: ftp_user -# If you want the anonymous login password to be more informative -# (and enable the use of picky ftp servers), set this to something -# reasonable for your domain, like wwwuser@somewhere.net -# -# The reason why this is domainless by default is the -# request can be made on the behalf of a user in any domain, -# depending on how the cache is used. -# Some ftp server also validate the email address is valid -# (for example perl.com). -# -#Default: -# ftp_user Squid@ - -# TAG: ftp_list_width -# Sets the width of ftp listings. This should be set to fit in -# the width of a standard browser. Setting this too small -# can cut off long filenames when browsing ftp sites. -# -#Default: -# ftp_list_width 32 - -# TAG: ftp_passive -# If your firewall does not allow Squid to use passive -# connections, turn off this option. -# -#Default: -# ftp_passive on - -# TAG: ftp_sanitycheck -# For security and data integrity reasons Squid by default performs -# sanity checks of the addresses of FTP data connections ensure the -# data connection is to the requested server. If you need to allow -# FTP connections to servers using another IP address for the data -# connection turn this off. -# -#Default: -# ftp_sanitycheck on - -# TAG: ftp_telnet_protocol -# The FTP protocol is officially defined to use the telnet protocol -# as transport channel for the control connection. However, many -# implementations are broken and does not respect this aspect of -# the FTP protocol. -# -# If you have trouble accessing files with ASCII code 255 in the -# path or similar problems involving this ASCII code you can -# try setting this directive to off. If that helps, report to the -# operator of the FTP server in question that their FTP server -# is broken and does not follow the FTP standard. -# -#Default: -# ftp_telnet_protocol on - - -# OPTIONS FOR EXTERNAL SUPPORT PROGRAMS -# ----------------------------------------------------------------------------- - -# TAG: diskd_program -# Specify the location of the diskd executable. -# Note this is only useful if you have compiled in -# diskd as one of the store io modules. -# -#Default: -# diskd_program /usr/lib/squid/diskd-daemon - -# TAG: unlinkd_program -# Specify the location of the executable for file deletion process. -# -#Default: -# unlinkd_program /usr/lib/squid/unlinkd - -# TAG: pinger_program -# Note: This option is only available if Squid is rebuilt with the -# --enable-icmp option -# -# Specify the location of the executable for the pinger process. -# -#Default: -# pinger_program /usr/lib/squid/pinger - - -# OPTIONS FOR URL REWRITING -# ----------------------------------------------------------------------------- - -# TAG: storeurl_rewrite_program -# Specify the location of the executable for the Store URL rewriter. -# The Store URL rewriter allows URLs to be "normalised" ; mapping -# multiple URLs to a single URL representation for cache operations. -# -# For example, if you request an object at: -# -# http://srv1.example.com/image.gif -# -# and a subsequent request for: -# -# http://srv2.example.com/image.gif -# -# then Squid will treat these both as different URLs and cache them -# seperately. -# -# This is almost the normal case, but an increasing number of sites -# distribute the same content between multiple frontend hosts. -# The Store URL rewriter allows you to rewrite these URLs to one URL -# to use for cache operations, but not -fetches-. Fetches are still -# made from the original site, but stored with the store URL rewritten -# URL as the store key. -# -# For each requested URL rewriter will receive on line with the format -# -# URL <SP> client_ip "/" fqdn <SP> user <SP> method <SP> urlgroup -# [<SP> kvpairs] <NL> -# -# In the future, the rewriter interface will be extended with -# key=value pairs ("kvpairs" shown above). Rewriter programs -# should be prepared to receive and possibly ignore additional -# whitespace-separated tokens on each input line. -# -# And the rewriter may return a rewritten URL. The other components of -# the request line does not need to be returned (ignored if they are). -# -# By default, a Store URL rewriter is not used. -# -# Please note - the normal URL rewriter rewrites Squid's _destination_ -# URL - ie, what it fetches. The Store URL rewriter rewrites Squid's -# _store_ URL - ie, what it uses to store and retrieve objects. -# -#Default: -# none - -# TAG: storeurl_rewrite_children -# -# -#Default: -# storeurl_rewrite_children 5 - -# TAG: storeurl_rewrite_concurrency -# -# -#Default: -# storeurl_rewrite_concurrency 0 - -# TAG: url_rewrite_program -# Specify the location of the executable for the URL rewriter. -# Since they can perform almost any function there isn't one included. -# -# For each requested URL rewriter will receive on line with the format -# -# URL <SP> client_ip "/" fqdn <SP> user <SP> method <SP> urlgroup -# [<SP> kvpairs] <NL> -# -# In the future, the rewriter interface will be extended with -# key=value pairs ("kvpairs" shown above). Rewriter programs -# should be prepared to receive and possibly ignore additional -# whitespace-separated tokens on each input line. -# -# And the rewriter may return a rewritten URL. The other components of -# the request line does not need to be returned (ignored if they are). -# -# The rewriter can also indicate that a client-side redirect should -# be performed to the new URL. This is done by prefixing the returned -# URL with "301:" (moved permanently) or 302: (moved temporarily). -# -# It can also return a "urlgroup" that can subsequently be matched -# in cache_peer_access and similar ACL driven rules. An urlgroup is -# returned by prefixing the returned URL with "!urlgroup!". -# -# By default, a URL rewriter is not used. -# -#Default: -# none - -# TAG: url_rewrite_children -# The number of redirector processes to spawn. If you start -# too few Squid will have to wait for them to process a backlog of -# URLs, slowing it down. If you start too many they will use RAM -# and other system resources. -# -#Default: -# url_rewrite_children 5 - -# TAG: url_rewrite_concurrency -# The number of requests each redirector helper can handle in -# parallel. Defaults to 0 which indicates the redirector -# is a old-style single threaded redirector. -# -# When this directive is set to a value >= 1 then the protocol -# used to communicate with the helper is modified to include -# a request ID in front of the request/response. The request -# ID from the request must be echoed back with the response -# to that request. -# -#Default: -# url_rewrite_concurrency 0 - -# TAG: url_rewrite_host_header -# By default Squid rewrites any Host: header in redirected -# requests. If you are running an accelerator this may -# not be a wanted effect of a redirector. -# -# WARNING: Entries are cached on the result of the URL rewriting -# process, so be careful if you have domain-virtual hosts. -# -#Default: -# url_rewrite_host_header on - -# TAG: url_rewrite_access -# If defined, this access list specifies which requests are -# sent to the redirector processes. By default all requests -# are sent. -# -#Default: -# none - -# TAG: storeurl_access -# -# -#Default: -# none - -# TAG: redirector_bypass -# When this is 'on', a request will not go through the -# redirector if all redirectors are busy. If this is 'off' -# and the redirector queue grows too large, Squid will exit -# with a FATAL error and ask you to increase the number of -# redirectors. You should only enable this if the redirectors -# are not critical to your caching system. If you use -# redirectors for access control, and you enable this option, -# users may have access to pages they should not -# be allowed to request. -# -#Default: -# redirector_bypass off - -# TAG: location_rewrite_program -# Specify the location of the executable for the Location rewriter, -# used to rewrite server generated redirects. Usually used in -# conjunction with a url_rewrite_program -# -# For each Location header received the location rewriter will receive -# one line with the format: -# -# location URL <SP> requested URL <SP> urlgroup <NL> -# -# And the rewriter may return a rewritten Location URL or a blank line. -# The other components of the request line does not need to be returned -# (ignored if they are). -# -# By default, a Location rewriter is not used. -# -#Default: -# none - -# TAG: location_rewrite_children -# The number of location rewriting processes to spawn. If you start -# too few Squid will have to wait for them to process a backlog of -# URLs, slowing it down. If you start too many they will use RAM -# and other system resources. -# -#Default: -# location_rewrite_children 5 - -# TAG: location_rewrite_concurrency -# The number of requests each Location rewriter helper can handle in -# parallel. Defaults to 0 which indicates that the helper -# is a old-style singlethreaded helper. -# -#Default: -# location_rewrite_concurrency 0 - -# TAG: location_rewrite_access -# If defined, this access list specifies which requests are -# sent to the location rewriting processes. By default all Location -# headers are sent. -# -#Default: -# none - - -# OPTIONS FOR TUNING THE CACHE -# ----------------------------------------------------------------------------- - -# TAG: cache -# A list of ACL elements which, if matched, cause the request to -# not be satisfied from the cache and the reply to not be cached. -# In other words, use this to force certain objects to never be cached. -# -# You must use the word 'DENY' to indicate the ACL names which should -# NOT be cached. -# -# Default is to allow all to be cached. -# -#Default: -# none - -# TAG: max_stale time-units -# This option puts an upper limit on how stale content Squid -# will serve from the cache if cache validation fails. -# -#Default: -# max_stale 1 week - -# TAG: refresh_pattern -# usage: refresh_pattern [-i] regex min percent max [options] -# -# By default, regular expressions are CASE-SENSITIVE. To make -# them case-insensitive, use the -i option. -# -# 'Min' is the time (in minutes) an object without an explicit -# expiry time should be considered fresh. The recommended -# value is 0, any higher values may cause dynamic applications -# to be erroneously cached unless the application designer -# has taken the appropriate actions. -# -# 'Percent' is a percentage of the objects age (time since last -# modification age) an object without explicit expiry time -# will be considered fresh. -# -# 'Max' is an upper limit on how long objects without an explicit -# expiry time will be considered fresh. -# -# options: override-expire -# override-lastmod -# reload-into-ims -# ignore-reload -# ignore-no-cache -# ignore-private -# ignore-auth -# stale-while-revalidate=NN -# ignore-stale-while-revalidate -# max-stale=NN -# negative-ttl=NN -# -# override-expire enforces min age even if the server -# sent an explicit expiry time (e.g., with the -# Expires: header or Cache-Control: max-age). Doing this -# VIOLATES the HTTP standard. Enabling this feature -# could make you liable for problems which it causes. -# -# Note: this does not enforce staleness - it only extends -# freshness / min. If the server returns a Expires time which -# is longer than your max time, Squid will still consider -# the object fresh for that period of time. -# -# override-lastmod enforces min age even on objects -# that were modified recently. -# -# reload-into-ims changes client no-cache or ``reload'' -# to If-Modified-Since requests. Doing this VIOLATES the -# HTTP standard. Enabling this feature could make you -# liable for problems which it causes. -# -# ignore-reload ignores a client no-cache or ``reload'' -# header. Doing this VIOLATES the HTTP standard. Enabling -# this feature could make you liable for problems which -# it causes. -# -# ignore-no-cache ignores any ``Pragma: no-cache'' and -# ``Cache-control: no-cache'' headers received from a server. -# The HTTP RFC never allows the use of this (Pragma) header -# from a server, only a client, though plenty of servers -# send it anyway. -# -# ignore-private ignores any ``Cache-control: private'' -# headers received from a server. Doing this VIOLATES -# the HTTP standard. Enabling this feature could make you -# liable for problems which it causes. -# -# ignore-auth caches responses to requests with authorization, -# as if the originserver had sent ``Cache-control: public'' -# in the response header. Doing this VIOLATES the HTTP standard. -# Enabling this feature could make you liable for problems which -# it causes. -# -# stale-while-revalidate=NN makes Squid perform an asyncronous -# cache validation if the object isn't more stale than NN. -# Doing this VIOLATES the HTTP standard. Enabling this -# feature could make you liable for problems which it -# causes. -# -# ignore-stale-while-revalidate makes Squid ignore any 'Cache-Control: -# stale-while-revalidate=NN' headers received from a server. Can be -# combined with stale-while-revalidate=NN to override the server provided -# value. -# -# max-stale=NN provided a maximum staleness factor. Squid won't -# serve objects more stale than this even if it failed to -# validate the object. -# -# negative-ttl=NN overrides the global negative_ttl parameter -# selectively for URLs matching this pattern (in seconds). -# -# Basically a cached object is: -# -# FRESH if expires < now, else STALE -# STALE if age > max -# FRESH if lm-factor < percent, else STALE -# FRESH if age < min -# else STALE -# -# The refresh_pattern lines are checked in the order listed here. -# The first entry which matches is used. If none of the entries -# match the default will be used. -# -# Note, you must uncomment all the default lines if you want -# to change one. The default setting is only active if none is -# used. -# -#Suggested default: -refresh_pattern ^ftp: 1440 20% 10080 -refresh_pattern ^gopher: 1440 0% 1440 -refresh_pattern -i (/cgi-bin/|\?) 0 0% 0 -refresh_pattern /(|In)Release(|\.gpg)$ 0 0% 0 -refresh_pattern /(Packages|Sources)(|\.gz|\.bz2|\.xz)$ 0 0% 0 -refresh_pattern \.deb$ 129600 100% 129600 -refresh_pattern \.udeb$ 129600 100% 129600 -refresh_pattern \.tar\.(gz|bz2|xz|lzma)$ 129600 100% 129600 -refresh_pattern . 0 20% 4320 - -# TAG: quick_abort_min (KB) -# TAG: quick_abort_max (KB) -# TAG: quick_abort_pct (percent) -# The cache by default continues downloading aborted requests -# which are almost completed (less than 16 KB remaining). This -# may be undesirable on slow (e.g. SLIP) links and/or very busy -# caches. Impatient users may tie up file descriptors and -# bandwidth by repeatedly requesting and immediately aborting -# downloads. -# -# When the user aborts a request, Squid will check the -# quick_abort values to the amount of data transfered until -# then. -# -# If the transfer has less than 'quick_abort_min' KB remaining, -# it will finish the retrieval. -# -# If the transfer has more than 'quick_abort_max' KB remaining, -# it will abort the retrieval. -# -# If more than 'quick_abort_pct' of the transfer has completed, -# it will finish the retrieval. -# -# If you do not want any retrieval to continue after the client -# has aborted, set both 'quick_abort_min' and 'quick_abort_max' -# to '0 KB'. -# -# If you want retrievals to always continue if they are being -# cached set 'quick_abort_min' to '-1 KB'. -# -#Default: -# quick_abort_min 16 KB -# quick_abort_max 16 KB -# quick_abort_pct 95 - -# TAG: read_ahead_gap buffer-size -# The amount of data the cache will buffer ahead of what has been -# sent to the client when retrieving an object from another server. -# -#Default: -# read_ahead_gap 16 KB - -# TAG: negative_ttl time-units -# Time-to-Live (TTL) for failed requests. Certain types of -# failures (such as "connection refused" and "404 Not Found") are -# negatively-cached for a configurable amount of time. The -# default is 5 minutes. Note that this is different from -# negative caching of DNS lookups. -# -#Default: -# negative_ttl 5 minutes - -# TAG: positive_dns_ttl time-units -# Upper limit on how long Squid will cache positive DNS responses. -# Default is 6 hours (360 minutes). This directive must be set -# larger than negative_dns_ttl. -# -#Default: -# positive_dns_ttl 6 hours - -# TAG: negative_dns_ttl time-units -# Time-to-Live (TTL) for negative caching of failed DNS lookups. -# This also sets the lower cache limit on positive lookups. -# Minimum value is 1 second, and it is not recommendable to go -# much below 10 seconds. -# -#Default: -# negative_dns_ttl 1 minute - -# TAG: range_offset_limit (bytes) -# Sets a upper limit on how far into the the file a Range request -# may be to cause Squid to prefetch the whole file. If beyond this -# limit Squid forwards the Range request as it is and the result -# is NOT cached. -# -# This is to stop a far ahead range request (lets say start at 17MB) -# from making Squid fetch the whole object up to that point before -# sending anything to the client. -# -# A value of -1 causes Squid to always fetch the object from the -# beginning so it may cache the result. (2.0 style) -# -# A value of 0 causes Squid to never fetch more than the -# client requested. (default) -# -#Default: -# range_offset_limit 0 KB - -# TAG: minimum_expiry_time (seconds) -# The minimum caching time according to (Expires - Date) -# Headers Squid honors if the object can't be revalidated -# defaults to 60 seconds. In reverse proxy enorinments it -# might be desirable to honor shorter object lifetimes. It -# is most likely better to make your server return a -# meaningful Last-Modified header however. -# -#Default: -# minimum_expiry_time 60 seconds - -# TAG: store_avg_object_size (kbytes) -# Average object size, used to estimate number of objects your -# cache can hold. The default is 13 KB. -# -#Default: -# store_avg_object_size 13 KB - -# TAG: store_objects_per_bucket -# Target number of objects per bucket in the store hash table. -# Lowering this value increases the total number of buckets and -# also the storage maintenance rate. The default is 20. -# -#Default: -# store_objects_per_bucket 20 - - -# HTTP OPTIONS -# ----------------------------------------------------------------------------- - -# TAG: request_header_max_size (KB) -# This specifies the maximum size for HTTP headers in a request. -# Request headers are usually relatively small (about 512 bytes). -# Placing a limit on the request header size will catch certain -# bugs (for example with persistent connections) and possibly -# buffer-overflow or denial-of-service attacks. -# -#Default: -# request_header_max_size 20 KB - -# TAG: reply_header_max_size (KB) -# This specifies the maximum size for HTTP headers in a reply. -# Reply headers are usually relatively small (about 512 bytes). -# Placing a limit on the reply header size will catch certain -# bugs (for example with persistent connections) and possibly -# buffer-overflow or denial-of-service attacks. -# -#Default: -# reply_header_max_size 20 KB - -# TAG: request_body_max_size (KB) -# This specifies the maximum size for an HTTP request body. -# In other words, the maximum size of a PUT/POST request. -# A user who attempts to send a request with a body larger -# than this limit receives an "Invalid Request" error message. -# If you set this parameter to a zero (the default), there will -# be no limit imposed. -# -#Default: -# request_body_max_size 0 KB - -# TAG: broken_posts -# A list of ACL elements which, if matched, causes Squid to send -# an extra CRLF pair after the body of a PUT/POST request. -# -# Some HTTP servers has broken implementations of PUT/POST, -# and rely on an extra CRLF pair sent by some WWW clients. -# -# Quote from RFC2616 section 4.1 on this matter: -# -# Note: certain buggy HTTP/1.0 client implementations generate an -# extra CRLF's after a POST request. To restate what is explicitly -# forbidden by the BNF, an HTTP/1.1 client must not preface or follow -# a request with an extra CRLF. -# -#Example: -# acl buggy_server url_regex ^http://.... -# broken_posts allow buggy_server -# -#Default: -# none - -# TAG: upgrade_http0.9 -# This access list controls when HTTP/0.9 responses is upgraded -# to our current HTTP version. The default is to always upgrade. -# -# Some applications expect to be able to respond with non-HTTP -# responses and clients gets confused if the response is upgraded. -# For example SHOUTcast servers used for mp3 streaming. -# -# To enable some flexibility in detection of such applications -# the first line of the response is available in the internal header -# X-HTTP09-First-Line for use in the rep_header acl. -# -# Don't upgrade ShoutCast responses to HTTP -acl shoutcast rep_header X-HTTP09-First-Line ^ICY.[0-9] -upgrade_http0.9 deny shoutcast - -# TAG: via on|off -# If set (default), Squid will include a Via header in requests and -# replies as required by RFC2616. -# -#Default: -# via on - -# TAG: cache_vary -# When 'cache_vary' is set to off, response that have a -# Vary header will not be stored in the cache. -# -#Default: -# cache_vary on - -# TAG: broken_vary_encoding -# Many servers have broken support for on-the-fly Content-Encoding, -# returning the same ETag on both plain and gzip:ed variants. -# Vary replies matching this access list will have the cache split -# on the Accept-Encoding header of the request and not trusting the -# ETag to be unique. -# -# Apache mod_gzip and mod_deflate known to be broken so don't trust -# Apache to signal ETag correctly on such responses -acl apache rep_header Server ^Apache -broken_vary_encoding allow apache - -# TAG: collapsed_forwarding (on|off) -# This option enables multiple requests for the same URI to be -# processed as one request. Normally disabled to avoid increased -# latency on dynamic content, but there can be benefit from enabling -# this in accelerator setups where the web servers are the bottleneck -# and reliable and returns mostly cacheable information. -# -#Default: -# collapsed_forwarding off - -# TAG: refresh_stale_hit (time) -# This option changes the refresh algorithm to allow concurrent -# requests while an object is being refreshed to be processed as -# cache hits if the object expired less than X seconds ago. Default -# is 0 to disable this feature. This option is mostly interesting -# in accelerator setups where a few objects is accessed very -# frequently. -# -#Default: -# refresh_stale_hit 0 seconds - -# TAG: ie_refresh on|off -# Microsoft Internet Explorer up until version 5.5 Service -# Pack 1 has an issue with transparent proxies, wherein it -# is impossible to force a refresh. Turning this on provides -# a partial fix to the problem, by causing all IMS-REFRESH -# requests from older IE versions to check the origin server -# for fresh content. This reduces hit ratio by some amount -# (~10% in my experience), but allows users to actually get -# fresh content when they want it. Note because Squid -# cannot tell if the user is using 5.5 or 5.5SP1, the behavior -# of 5.5 is unchanged from old versions of Squid (i.e. a -# forced refresh is impossible). Newer versions of IE will, -# hopefully, continue to have the new behavior and will be -# handled based on that assumption. This option defaults to -# the old Squid behavior, which is better for hit ratios but -# worse for clients using IE, if they need to be able to -# force fresh content. -# -#Default: -# ie_refresh off - -# TAG: vary_ignore_expire on|off -# Many HTTP servers supporting Vary gives such objects -# immediate expiry time with no cache-control header -# when requested by a HTTP/1.0 client. This option -# enables Squid to ignore such expiry times until -# HTTP/1.1 is fully implemented. -# WARNING: This may eventually cause some varying -# objects not intended for caching to get cached. -# -#Default: -# vary_ignore_expire off - -# TAG: extension_methods -# Squid only knows about standardized HTTP request methods. -# You can add up to 20 additional "extension" methods here. -extension_methods REPORT MERGE MKACTIVITY CHECKOUT - -# TAG: request_entities -# Squid defaults to deny GET and HEAD requests with request entities, -# as the meaning of such requests are undefined in the HTTP standard -# even if not explicitly forbidden. -# -# Set this directive to on if you have clients which insists -# on sending request entities in GET or HEAD requests. But be warned -# that there is server software (both proxies and web servers) which -# can fail to properly process this kind of request which may make you -# vulnerable to cache pollution attacks if enabled. -# -#Default: -# request_entities off - -# TAG: header_access -# Usage: header_access header_name allow|deny [!]aclname ... -# -# WARNING: Doing this VIOLATES the HTTP standard. Enabling -# this feature could make you liable for problems which it -# causes. -# -# This option replaces the old 'anonymize_headers' and the -# older 'http_anonymizer' option with something that is much -# more configurable. This new method creates a list of ACLs -# for each header, allowing you very fine-tuned header -# mangling. -# -# You can only specify known headers for the header name. -# Other headers are reclassified as 'Other'. You can also -# refer to all the headers with 'All'. -# -# For example, to achieve the same behavior as the old -# 'http_anonymizer standard' option, you should use: -# -# header_access From deny all -# header_access Referer deny all -# header_access Server deny all -# header_access User-Agent deny all -# header_access WWW-Authenticate deny all -# header_access Link deny all -# -# Or, to reproduce the old 'http_anonymizer paranoid' feature -# you should use: -# -# header_access Allow allow all -# header_access Authorization allow all -# header_access WWW-Authenticate allow all -# header_access Proxy-Authorization allow all -# header_access Proxy-Authenticate allow all -# header_access Cache-Control allow all -# header_access Content-Encoding allow all -# header_access Content-Length allow all -# header_access Content-Type allow all -# header_access Date allow all -# header_access Expires allow all -# header_access Host allow all -# header_access If-Modified-Since allow all -# header_access Last-Modified allow all -# header_access Location allow all -# header_access Pragma allow all -# header_access Accept allow all -# header_access Accept-Charset allow all -# header_access Accept-Encoding allow all -# header_access Accept-Language allow all -# header_access Content-Language allow all -# header_access Mime-Version allow all -# header_access Retry-After allow all -# header_access Title allow all -# header_access Connection allow all -# header_access Proxy-Connection allow all -# header_access All deny all -# -# By default, all headers are allowed (no anonymizing is -# performed). -# -#Default: -# none - -# TAG: header_replace -# Usage: header_replace header_name message -# Example: header_replace User-Agent Nutscrape/1.0 (CP/M; 8-bit) -# -# This option allows you to change the contents of headers -# denied with header_access above, by replacing them with -# some fixed string. This replaces the old fake_user_agent -# option. -# -# By default, headers are removed if denied. -# -#Default: -# none - -# TAG: relaxed_header_parser on|off|warn -# In the default "on" setting Squid accepts certain forms -# of non-compliant HTTP messages where it is unambiguous -# what the sending application intended even if the message -# is not correctly formatted. The messages is then normalized -# to the correct form when forwarded by Squid. -# -# If set to "warn" then a warning will be emitted in cache.log -# each time such HTTP error is encountered. -# -# If set to "off" then such HTTP errors will cause the request -# or response to be rejected. -# -#Default: -# relaxed_header_parser on - -# TAG: server_http11 on|off -# This option enables the use ot HTTP/1.1 on outgoing "direct" requests. -# See also the http11 cache_peer option. -# Note: The HTTP/1.1 support is still incomplete, with an -# internal HTTP/1.0 hop. As result 1xx responses will not -# be forwarded. -# -#Default: -# server_http11 off - -# TAG: ignore_expect_100 on|off -# This option makes Squid ignore any Expect: 100-continue header present -# in the request. -# Note: Enabling this is a HTTP protocol violation, but some client may -# not handle it well.. -# -#Default: -# ignore_expect_100 off - -# TAG: external_refresh_check -# This option defines an external helper for determining whether to -# refresh a stale response. It will be called when Squid receives a -# request for a cached response that is stale; the helper can either -# confirm that the response is stale with a STALE response, or -# extend the freshness of the response (thereby avoiding a refresh -# check) with a FRESH response, along with a freshness=nnn keyword. -# -# external_refresh_check [options] FORMAT.. /path/to/helper [helper_args] -# -# If present, helper_args will be passed to the helper on the command -# line verbatim. -# -# Options: -# -# children=n Number of processes to spawn to service external -# refresh checks (default 5). -# concurrency=n Concurrency level per process. Only used with -# helpers capable of processing more than one query -# at a time. -# -# When using the concurrency option, the protocol is changed by introducing -# a query channel tag infront of the request/response. The query channel -# tag is a number between 0 and concurrency-1. -# -# FORMAT specifications: -# -# %CACHE_URI The URI of the cached response -# %RES{Header} HTTP response header value -# %AGE The age of the cached response -# -# The request sent to the helper consists of the data in the format -# specification in the order specified. -# -# The helper receives lines per the above format specification, and -# returns lines starting with OK or ERR indicating the validity of -# the request and optionally followed by additional keywords with -# more details. URL escaping is used to protect each value in both -# requests and responses. -# -# General result syntax: -# -# FRESH / STALE keyword=value ... -# -# Defined keywords: -# -# freshness=nnn The number of seconds to extend the freshness of -# the response by. -# log=string String to be logged in access.log. Available as -# %ef in logformat specifications. -# res{Header}=value -# Value to update response headers with. If already -# present, the supplied value completely replaces -# the cached value. -# -# In the event of a helper-related error (e.g., overload), Squid -# will always default to STALE. -# -#Default: -# none - - -# TIMEOUTS -# ----------------------------------------------------------------------------- - -# TAG: forward_timeout time-units -# This parameter specifies how long Squid should at most attempt in -# finding a forwarding path for the request before giving up. -# -#Default: -# forward_timeout 4 minutes - -# TAG: connect_timeout time-units -# This parameter specifies how long to wait for the TCP connect to -# the requested server or peer to complete before Squid should -# attempt to find another path where to forward the request. -# -#Default: -# connect_timeout 1 minute - -# TAG: peer_connect_timeout time-units -# This parameter specifies how long to wait for a pending TCP -# connection to a peer cache. The default is 30 seconds. You -# may also set different timeout values for individual neighbors -# with the 'connect-timeout' option on a 'cache_peer' line. -# -#Default: -# peer_connect_timeout 30 seconds - -# TAG: read_timeout time-units -# The read_timeout is applied on server-side connections. After -# each successful read(), the timeout will be extended by this -# amount. If no data is read again after this amount of time, -# the request is aborted and logged with ERR_READ_TIMEOUT. The -# default is 15 minutes. -# -#Default: -# read_timeout 15 minutes - -# TAG: request_timeout -# How long to wait for an HTTP request after initial -# connection establishment. -# -#Default: -# request_timeout 5 minutes - -# TAG: persistent_request_timeout -# How long to wait for the next HTTP request on a persistent -# connection after the previous request completes. -# -#Default: -# persistent_request_timeout 2 minutes - -# TAG: client_lifetime time-units -# The maximum amount of time a client (browser) is allowed to -# remain connected to the cache process. This protects the Cache -# from having a lot of sockets (and hence file descriptors) tied up -# in a CLOSE_WAIT state from remote clients that go away without -# properly shutting down (either because of a network failure or -# because of a poor client implementation). The default is one -# day, 1440 minutes. -# -# NOTE: The default value is intended to be much larger than any -# client would ever need to be connected to your cache. You -# should probably change client_lifetime only as a last resort. -# If you seem to have many client connections tying up -# filedescriptors, we recommend first tuning the read_timeout, -# request_timeout, persistent_request_timeout and quick_abort values. -# -#Default: -# client_lifetime 1 day - -# TAG: half_closed_clients -# Some clients may shutdown the sending side of their TCP -# connections, while leaving their receiving sides open. Sometimes, -# Squid can not tell the difference between a half-closed and a -# fully-closed TCP connection. By default, half-closed client -# connections are kept open until a read(2) or write(2) on the -# socket returns an error. Change this option to 'off' and Squid -# will immediately close client connections when read(2) returns -# "no more data to read." -# -#Default: -# half_closed_clients on - -# TAG: pconn_timeout -# Timeout for idle persistent connections to servers and other -# proxies. -# -#Default: -# pconn_timeout 1 minute - -# TAG: ident_timeout -# Maximum time to wait for IDENT lookups to complete. -# -# If this is too high, and you enabled IDENT lookups from untrusted -# users, you might be susceptible to denial-of-service by having -# many ident requests going at once. -# -#Default: -# ident_timeout 10 seconds - -# TAG: shutdown_lifetime time-units -# When SIGTERM or SIGHUP is received, the cache is put into -# "shutdown pending" mode until all active sockets are closed. -# This value is the lifetime to set for all open descriptors -# during shutdown mode. Any active clients after this many -# seconds will receive a 'timeout' message. -# -#Default: -# shutdown_lifetime 30 seconds - - -# ADMINISTRATIVE PARAMETERS -# ----------------------------------------------------------------------------- - -# TAG: cache_mgr -# Email-address of local cache manager who will receive -# mail if the cache dies. The default is "webmaster". -# -#Default: -# cache_mgr webmaster - -# TAG: mail_from -# From: email-address for mail sent when the cache dies. -# The default is to use 'appname@unique_hostname'. -# Default appname value is "squid", can be changed into -# src/globals.h before building squid. -# -#Default: -# none - -# TAG: mail_program -# Email program used to send mail if the cache dies. -# The default is "mail". The specified program must comply -# with the standard Unix mail syntax: -# mail-program recipient < mailfile -# -# Optional command line options can be specified. -# -#Default: -# mail_program mail - -# TAG: cache_effective_user -# If you start Squid as root, it will change its effective/real -# UID/GID to the user specified below. The default is to change -# to UID to proxy. If you define cache_effective_user, but not -# cache_effective_group, Squid sets the GID to the effective -# user's default group ID (taken from the password file) and -# supplementary group list from the from groups membership of -# cache_effective_user. -# -#Default: -# cache_effective_user proxy - -# TAG: cache_effective_group -# If you want Squid to run with a specific GID regardless of -# the group memberships of the effective user then set this -# to the group (or GID) you want Squid to run as. When set -# all other group privileges of the effective user is ignored -# and only this GID is effective. If Squid is not started as -# root the user starting Squid must be member of the specified -# group. -# -#Default: -# none - -# TAG: httpd_suppress_version_string on|off -# Suppress Squid version string info in HTTP headers and HTML error pages. -# -#Default: -# httpd_suppress_version_string off - -# TAG: visible_hostname -# If you want to present a special hostname in error messages, etc, -# define this. Otherwise, the return value of gethostname() -# will be used. If you have multiple caches in a cluster and -# get errors about IP-forwarding you must set them to have individual -# names with this setting. -# -#Default: -# none - -# TAG: unique_hostname -# If you want to have multiple machines with the same -# 'visible_hostname' you must give each machine a different -# 'unique_hostname' so forwarding loops can be detected. -# -#Default: -# none - -# TAG: hostname_aliases -# A list of other DNS names your cache has. -# -#Default: -# none - -# TAG: umask -# Minimum umask which should be enforced while the proxy -# is running, in addition to the umask set at startup. -# -# Note: Should start with a 0 to indicate the normal octal -# representation of umasks -# -#Default: -# umask 027 - - -# OPTIONS FOR THE CACHE REGISTRATION SERVICE -# ----------------------------------------------------------------------------- -# -# This section contains parameters for the (optional) cache -# announcement service. This service is provided to help -# cache administrators locate one another in order to join or -# create cache hierarchies. -# -# An 'announcement' message is sent (via UDP) to the registration -# service by Squid. By default, the announcement message is NOT -# SENT unless you enable it with 'announce_period' below. -# -# The announcement message includes your hostname, plus the -# following information from this configuration file: -# -# http_port -# icp_port -# cache_mgr -# -# All current information is processed regularly and made -# available on the Web at http://www.ircache.net/Cache/Tracker/. - -# TAG: announce_period -# This is how frequently to send cache announcements. The -# default is `0' which disables sending the announcement -# messages. -# -# To enable announcing your cache, just uncomment the line -# below. -# -#Default: -# announce_period 0 -# -#To enable announcing your cache, just uncomment the line below. -#announce_period 1 day - -# TAG: announce_host -# TAG: announce_file -# TAG: announce_port -# announce_host and announce_port set the hostname and port -# number where the registration message will be sent. -# -# Hostname will default to 'tracker.ircache.net' and port will -# default default to 3131. If the 'filename' argument is given, -# the contents of that file will be included in the announce -# message. -# -#Default: -# announce_host tracker.ircache.net -# announce_port 3131 - - -# HTTPD-ACCELERATOR OPTIONS -# ----------------------------------------------------------------------------- - -# TAG: httpd_accel_no_pmtu_disc on|off -# In many setups of transparently intercepting proxies Path-MTU -# discovery can not work on traffic towards the clients. This is -# the case when the intercepting device does not fully track -# connections and fails to forward ICMP must fragment messages -# to the cache server. -# -# If you have such setup and experience that certain clients -# sporadically hang or never complete requests set this to on. -# -#Default: -# httpd_accel_no_pmtu_disc off - - -# DELAY POOL PARAMETERS -# ----------------------------------------------------------------------------- - -# TAG: delay_pools -# This represents the number of delay pools to be used. For example, -# if you have one class 2 delay pool and one class 3 delays pool, you -# have a total of 2 delay pools. -# -#Default: -# delay_pools 0 - -# TAG: delay_class -# This defines the class of each delay pool. There must be exactly one -# delay_class line for each delay pool. For example, to define two -# delay pools, one of class 2 and one of class 3, the settings above -# and here would be: -# -#Example: -# delay_pools 2 # 2 delay pools -# delay_class 1 2 # pool 1 is a class 2 pool -# delay_class 2 3 # pool 2 is a class 3 pool -# -# The delay pool classes are: -# -# class 1 Everything is limited by a single aggregate -# bucket. -# -# class 2 Everything is limited by a single aggregate -# bucket as well as an "individual" bucket chosen -# from bits 25 through 32 of the IP address. -# -# class 3 Everything is limited by a single aggregate -# bucket as well as a "network" bucket chosen -# from bits 17 through 24 of the IP address and a -# "individual" bucket chosen from bits 17 through -# 32 of the IP address. -# -# NOTE: If an IP address is a.b.c.d -# -> bits 25 through 32 are "d" -# -> bits 17 through 24 are "c" -# -> bits 17 through 32 are "c * 256 + d" -# -#Default: -# none - -# TAG: delay_access -# This is used to determine which delay pool a request falls into. -# -# delay_access is sorted per pool and the matching starts with pool 1, -# then pool 2, ..., and finally pool N. The first delay pool where the -# request is allowed is selected for the request. If it does not allow -# the request to any pool then the request is not delayed (default). -# -# For example, if you want some_big_clients in delay -# pool 1 and lotsa_little_clients in delay pool 2: -# -#Example: -# delay_access 1 allow some_big_clients -# delay_access 1 deny all -# delay_access 2 allow lotsa_little_clients -# delay_access 2 deny all -# -#Default: -# none - -# TAG: delay_parameters -# This defines the parameters for a delay pool. Each delay pool has -# a number of "buckets" associated with it, as explained in the -# description of delay_class. For a class 1 delay pool, the syntax is: -# -#delay_parameters pool aggregate -# -# For a class 2 delay pool: -# -#delay_parameters pool aggregate individual -# -# For a class 3 delay pool: -# -#delay_parameters pool aggregate network individual -# -# The variables here are: -# -# pool a pool number - ie, a number between 1 and the -# number specified in delay_pools as used in -# delay_class lines. -# -# aggregate the "delay parameters" for the aggregate bucket -# (class 1, 2, 3). -# -# individual the "delay parameters" for the individual -# buckets (class 2, 3). -# -# network the "delay parameters" for the network buckets -# (class 3). -# -# A pair of delay parameters is written restore/maximum, where restore is -# the number of bytes (not bits - modem and network speeds are usually -# quoted in bits) per second placed into the bucket, and maximum is the -# maximum number of bytes which can be in the bucket at any time. -# -# For example, if delay pool number 1 is a class 2 delay pool as in the -# above example, and is being used to strictly limit each host to 64kbps -# (plus overheads), with no overall limit, the line is: -# -#delay_parameters 1 -1/-1 8000/8000 -# -# Note that the figure -1 is used to represent "unlimited". -# -# And, if delay pool number 2 is a class 3 delay pool as in the above -# example, and you want to limit it to a total of 256kbps (strict limit) -# with each 8-bit network permitted 64kbps (strict limit) and each -# individual host permitted 4800bps with a bucket maximum size of 64kb -# to permit a decent web page to be downloaded at a decent speed -# (if the network is not being limited due to overuse) but slow down -# large downloads more significantly: -# -#delay_parameters 2 32000/32000 8000/8000 600/8000 -# -# There must be one delay_parameters line for each delay pool. -# -#Default: -# none - -# TAG: delay_initial_bucket_level (percent, 0-100) -# The initial bucket percentage is used to determine how much is put -# in each bucket when squid starts, is reconfigured, or first notices -# a host accessing it (in class 2 and class 3, individual hosts and -# networks only have buckets associated with them once they have been -# "seen" by squid). -# -#Default: -# delay_initial_bucket_level 50 - - -# WCCPv1 AND WCCPv2 CONFIGURATION OPTIONS -# ----------------------------------------------------------------------------- - -# TAG: wccp_router -# TAG: wccp2_router -# Use this option to define your WCCP ``home'' router for -# Squid. -# -# wccp_router supports a single WCCP(v1) router -# -# wccp2_router supports multiple WCCPv2 routers -# -# only one of the two may be used at the same time and defines -# which version of WCCP to use. -# -#Default: -# wccp_router 0.0.0.0 - -# TAG: wccp_version -# This directive is only relevant if you need to set up WCCP(v1) -# to some very old and end-of-life Cisco routers. In all other -# setups it must be left unset or at the default setting. -# It defines an internal version in the WCCP(v1) protocol, -# with version 4 being the officially documented protocol. -# -# According to some users, Cisco IOS 11.2 and earlier only -# support WCCP version 3. If you're using that or an earlier -# version of IOS, you may need to change this value to 3, otherwise -# do not specify this parameter. -# -#Default: -# wccp_version 4 - -# TAG: wccp2_rebuild_wait -# If this is enabled Squid will wait for the cache dir rebuild to finish -# before sending the first wccp2 HereIAm packet -# -#Default: -# wccp2_rebuild_wait on - -# TAG: wccp2_forwarding_method -# WCCP2 allows the setting of forwarding methods between the -# router/switch and the cache. Valid values are as follows: -# -# 1 - GRE encapsulation (forward the packet in a GRE/WCCP tunnel) -# 2 - L2 redirect (forward the packet using Layer 2/MAC rewriting) -# -# Currently (as of IOS 12.4) cisco routers only support GRE. -# Cisco switches only support the L2 redirect assignment method. -# -#Default: -# wccp2_forwarding_method 1 - -# TAG: wccp2_return_method -# WCCP2 allows the setting of return methods between the -# router/switch and the cache for packets that the cache -# decides not to handle. Valid values are as follows: -# -# 1 - GRE encapsulation (forward the packet in a GRE/WCCP tunnel) -# 2 - L2 redirect (forward the packet using Layer 2/MAC rewriting) -# -# Currently (as of IOS 12.4) cisco routers only support GRE. -# Cisco switches only support the L2 redirect assignment. -# -# If the "ip wccp redirect exclude in" command has been -# enabled on the cache interface, then it is still safe for -# the proxy server to use a l2 redirect method even if this -# option is set to GRE. -# -#Default: -# wccp2_return_method 1 - -# TAG: wccp2_assignment_method -# WCCP2 allows the setting of methods to assign the WCCP hash -# Valid values are as follows: -# -# 1 - Hash assignment -# 2 - Mask assignment -# -# As a general rule, cisco routers support the hash assignment method -# and cisco switches support the mask assignment method. -# -#Default: -# wccp2_assignment_method 1 - -# TAG: wccp2_service -# WCCP2 allows for multiple traffic services. There are two -# types: "standard" and "dynamic". The standard type defines -# one service id - http (id 0). The dynamic service ids can be from -# 51 to 255 inclusive. In order to use a dynamic service id -# one must define the type of traffic to be redirected; this is done -# using the wccp2_service_info option. -# -# The "standard" type does not require a wccp2_service_info option, -# just specifying the service id will suffice. -# -# MD5 service authentication can be enabled by adding -# "password=<password>" to the end of this service declaration. -# -# Examples: -# -# wccp2_service standard 0 # for the 'web-cache' standard service -# wccp2_service dynamic 80 # a dynamic service type which will be -# # fleshed out with subsequent options. -# wccp2_service standard 0 password=foo -# -# -#Default: -# wccp2_service standard 0 - -# TAG: wccp2_service_info -# Dynamic WCCPv2 services require further information to define the -# traffic you wish to have diverted. -# -# The format is: -# -# wccp2_service_info <id> protocol=<protocol> flags=<flag>,<flag>.. -# priority=<priority> ports=<port>,<port>.. -# -# The relevant WCCPv2 flags: -# + src_ip_hash, dst_ip_hash -# + source_port_hash, dst_port_hash -# + src_ip_alt_hash, dst_ip_alt_hash -# + src_port_alt_hash, dst_port_alt_hash -# + ports_source -# -# The port list can be one to eight entries. -# -# Example: -# -# wccp2_service_info 80 protocol=tcp flags=src_ip_hash,ports_source -# priority=240 ports=80 -# -# Note: the service id must have been defined by a previous -# 'wccp2_service dynamic <id>' entry. -# -#Default: -# none - -# TAG: wccp2_weight -# Each cache server gets assigned a set of the destination -# hash proportional to their weight. -# -#Default: -# wccp2_weight 10000 - -# TAG: wccp_address -# TAG: wccp2_address -# Use this option if you require WCCP to use a specific -# interface address. -# -# The default behavior is to not bind to any specific address. -# -#Default: -# wccp_address 0.0.0.0 -# wccp2_address 0.0.0.0 - - -# PERSISTENT CONNECTION HANDLING -# ----------------------------------------------------------------------------- -# -# Also see "pconn_timeout" in the TIMEOUTS section - -# TAG: client_persistent_connections -# TAG: server_persistent_connections -# Persistent connection support for clients and servers. By -# default, Squid uses persistent connections (when allowed) -# with its clients and servers. You can use these options to -# disable persistent connections with clients and/or servers. -# -#Default: -# client_persistent_connections on -# server_persistent_connections on - -# TAG: persistent_connection_after_error -# With this directive the use of persistent connections after -# HTTP errors can be disabled. Useful if you have clients -# who fail to handle errors on persistent connections proper. -# -#Default: -# persistent_connection_after_error off - -# TAG: detect_broken_pconn -# Some servers have been found to incorrectly signal the use -# of HTTP/1.0 persistent connections even on replies not -# compatible, causing significant delays. This server problem -# has mostly been seen on redirects. -# -# By enabling this directive Squid attempts to detect such -# broken replies and automatically assume the reply is finished -# after 10 seconds timeout. -# -#Default: -# detect_broken_pconn off - - -# CACHE DIGEST OPTIONS -# ----------------------------------------------------------------------------- - -# TAG: digest_generation -# This controls whether the server will generate a Cache Digest -# of its contents. -# -#Default: -# digest_generation on - -# TAG: digest_bits_per_entry -# This is the number of bits of the server's Cache Digest which -# will be associated with the Digest entry for a given HTTP -# Method and URL (public key) combination. The default is 5. -# -#Default: -# digest_bits_per_entry 5 - -# TAG: digest_rebuild_period (seconds) -# This is the wait time between Cache Digest rebuilds. -# -#Default: -# digest_rebuild_period 1 hour - -# TAG: digest_rewrite_period (seconds) -# This is the wait time between Cache Digest writes to disk. -# -#Default: -# digest_rewrite_period 1 hour - -# TAG: digest_swapout_chunk_size (bytes) -# This is the number of bytes of the Cache Digest to write to -# disk at a time. It defaults to 4096 bytes (4KB), the Squid -# default swap page. -# -#Default: -# digest_swapout_chunk_size 4096 bytes - -# TAG: digest_rebuild_chunk_percentage (percent, 0-100) -# This is the percentage of the Cache Digest to be scanned at a -# time. By default it is set to 10% of the Cache Digest. -# -#Default: -# digest_rebuild_chunk_percentage 10 - - -# SNMP OPTIONS -# ----------------------------------------------------------------------------- - -# TAG: snmp_port -# Squid can now serve statistics and status information via SNMP. -# By default it listens to port 3401 on the machine. If you don't -# wish to use SNMP, set this to "0". -# -# Note: on Debian/Linux, the default is zero - you need to -# set it to 3401 to enable it. -# -#Default: -# snmp_port 0 - -# TAG: snmp_access -# Allowing or denying access to the SNMP port. -# -# All access to the agent is denied by default. -# usage: -# -# snmp_access allow|deny [!]aclname ... -# -#Example: -# snmp_access allow snmppublic localhost -# snmp_access deny all -# -#Default: -# snmp_access deny all - -# TAG: snmp_incoming_address -# TAG: snmp_outgoing_address -# Just like 'udp_incoming_address' above, but for the SNMP port. -# -# snmp_incoming_address is used for the SNMP socket receiving -# messages from SNMP agents. -# snmp_outgoing_address is used for SNMP packets returned to SNMP -# agents. -# -# The default snmp_incoming_address (0.0.0.0) is to listen on all -# available network interfaces. -# -# If snmp_outgoing_address is set to 255.255.255.255 (the default) -# it will use the same socket as snmp_incoming_address. Only -# change this if you want to have SNMP replies sent using another -# address than where this Squid listens for SNMP queries. -# -# NOTE, snmp_incoming_address and snmp_outgoing_address can not have -# the same value since they both use port 3401. -# -#Default: -# snmp_incoming_address 0.0.0.0 -# snmp_outgoing_address 255.255.255.255 - - -# ICP OPTIONS -# ----------------------------------------------------------------------------- - -# TAG: icp_port -# The port number where Squid sends and receives ICP queries to -# and from neighbor caches. Default is 3130. To disable use -# "0". May be overridden with -u on the command line. -# -#Default: -# icp_port 3130 - -# TAG: htcp_port -# The port number where Squid sends and receives HTCP queries to -# and from neighbor caches. To turn it on you want to set it 4827. -# By default it is set to "0" (disabled). -# -#Default: -# htcp_port 0 - -# TAG: log_icp_queries on|off -# If set, ICP queries are logged to access.log. You may wish -# do disable this if your ICP load is VERY high to speed things -# up or to simplify log analysis. -# -#Default: -# log_icp_queries on - -# TAG: udp_incoming_address -# udp_incoming_address is used for UDP packets received from other -# caches. -# -# The default behavior is to not bind to any specific address. -# -# Only change this if you want to have all UDP queries received on -# a specific interface/address. -# -# NOTE: udp_incoming_address is used by the ICP, HTCP, and DNS -# modules. Altering it will affect all of them in the same manner. -# -# see also; udp_outgoing_address -# -# NOTE, udp_incoming_address and udp_outgoing_address can not -# have the same value since they both use the same port. -# -#Default: -# udp_incoming_address 0.0.0.0 - -# TAG: udp_outgoing_address -# udp_outgoing_address is used for UDP packets sent out to other -# caches. -# -# The default behavior is to not bind to any specific address. -# -# Instead it will use the same socket as udp_incoming_address. -# Only change this if you want to have UDP queries sent using another -# address than where this Squid listens for UDP queries from other -# caches. -# -# NOTE: udp_outgoing_address is used by the ICP, HTCP, and DNS -# modules. Altering it will affect all of them in the same manner. -# -# see also; udp_incoming_address -# -# NOTE, udp_incoming_address and udp_outgoing_address can not -# have the same value since they both use the same port. -# -#Default: -# udp_outgoing_address 255.255.255.255 - -# TAG: icp_hit_stale on|off -# If you want to return ICP_HIT for stale cache objects, set this -# option to 'on'. If you have sibling relationships with caches -# in other administrative domains, this should be 'off'. If you only -# have sibling relationships with caches under your control, -# it is probably okay to set this to 'on'. -# If set to 'on', your siblings should use the option "allow-miss" -# on their cache_peer lines for connecting to you. -# -#Default: -# icp_hit_stale off - -# TAG: minimum_direct_hops -# If using the ICMP pinging stuff, do direct fetches for sites -# which are no more than this many hops away. -# -#Default: -# minimum_direct_hops 4 - -# TAG: minimum_direct_rtt -# If using the ICMP pinging stuff, do direct fetches for sites -# which are no more than this many rtt milliseconds away. -# -#Default: -# minimum_direct_rtt 400 - -# TAG: netdb_low -# TAG: netdb_high -# The low and high water marks for the ICMP measurement -# database. These are counts, not percents. The defaults are -# 900 and 1000. When the high water mark is reached, database -# entries will be deleted until the low mark is reached. -# -#Default: -# netdb_low 900 -# netdb_high 1000 - -# TAG: netdb_ping_period -# The minimum period for measuring a site. There will be at -# least this much delay between successive pings to the same -# network. The default is five minutes. -# -#Default: -# netdb_ping_period 5 minutes - -# TAG: query_icmp on|off -# If you want to ask your peers to include ICMP data in their ICP -# replies, enable this option. -# -# If your peer has configured Squid (during compilation) with -# '--enable-icmp' that peer will send ICMP pings to origin server -# sites of the URLs it receives. If you enable this option the -# ICP replies from that peer will include the ICMP data (if available). -# Then, when choosing a parent cache, Squid will choose the parent with -# the minimal RTT to the origin server. When this happens, the -# hierarchy field of the access.log will be -# "CLOSEST_PARENT_MISS". This option is off by default. -# -#Default: -# query_icmp off - -# TAG: test_reachability on|off -# When this is 'on', ICP MISS replies will be ICP_MISS_NOFETCH -# instead of ICP_MISS if the target host is NOT in the ICMP -# database, or has a zero RTT. -# -#Default: -# test_reachability off - -# TAG: icp_query_timeout (msec) -# Normally Squid will automatically determine an optimal ICP -# query timeout value based on the round-trip-time of recent ICP -# queries. If you want to override the value determined by -# Squid, set this 'icp_query_timeout' to a non-zero value. This -# value is specified in MILLISECONDS, so, to use a 2-second -# timeout (the old default), you would write: -# -# icp_query_timeout 2000 -# -#Default: -# icp_query_timeout 0 - -# TAG: maximum_icp_query_timeout (msec) -# Normally the ICP query timeout is determined dynamically. But -# sometimes it can lead to very large values (say 5 seconds). -# Use this option to put an upper limit on the dynamic timeout -# value. Do NOT use this option to always use a fixed (instead -# of a dynamic) timeout value. To set a fixed timeout see the -# 'icp_query_timeout' directive. -# -#Default: -# maximum_icp_query_timeout 2000 - -# TAG: minimum_icp_query_timeout (msec) -# Normally the ICP query timeout is determined dynamically. But -# sometimes it can lead to very small timeouts, even lower than -# the normal latency variance on your link due to traffic. -# Use this option to put an lower limit on the dynamic timeout -# value. Do NOT use this option to always use a fixed (instead -# of a dynamic) timeout value. To set a fixed timeout see the -# 'icp_query_timeout' directive. -# -#Default: -# minimum_icp_query_timeout 5 - - -# MULTICAST ICP OPTIONS -# ----------------------------------------------------------------------------- - -# TAG: mcast_groups -# This tag specifies a list of multicast groups which your server -# should join to receive multicasted ICP queries. -# -# NOTE! Be very careful what you put here! Be sure you -# understand the difference between an ICP _query_ and an ICP -# _reply_. This option is to be set only if you want to RECEIVE -# multicast queries. Do NOT set this option to SEND multicast -# ICP (use cache_peer for that). ICP replies are always sent via -# unicast, so this option does not affect whether or not you will -# receive replies from multicast group members. -# -# You must be very careful to NOT use a multicast address which -# is already in use by another group of caches. -# -# If you are unsure about multicast, please read the Multicast -# chapter in the Squid FAQ (http://www.squid-cache.org/FAQ/). -# -# Usage: mcast_groups 239.128.16.128 224.0.1.20 -# -# By default, Squid doesn't listen on any multicast groups. -# -#Default: -# none - -# TAG: mcast_miss_addr -# Note: This option is only available if Squid is rebuilt with the -# --enable-multicast-miss option -# -# If you enable this option, every "cache miss" URL will -# be sent out on the specified multicast address. -# -# Do not enable this option unless you are are absolutely -# certain you understand what you are doing. -# -#Default: -# mcast_miss_addr 255.255.255.255 - -# TAG: mcast_miss_ttl -# Note: This option is only available if Squid is rebuilt with the -# --enable-multicast-miss option -# -# This is the time-to-live value for packets multicasted -# when multicasting off cache miss URLs is enabled. By -# default this is set to 'site scope', i.e. 16. -# -#Default: -# mcast_miss_ttl 16 - -# TAG: mcast_miss_port -# Note: This option is only available if Squid is rebuilt with the -# --enable-multicast-miss option -# -# This is the port number to be used in conjunction with -# 'mcast_miss_addr'. -# -#Default: -# mcast_miss_port 3135 - -# TAG: mcast_miss_encode_key -# Note: This option is only available if Squid is rebuilt with the -# --enable-multicast-miss option -# -# The URLs that are sent in the multicast miss stream are -# encrypted. This is the encryption key. -# -#Default: -# mcast_miss_encode_key XXXXXXXXXXXXXXXX - -# TAG: mcast_icp_query_timeout (msec) -# For multicast peers, Squid regularly sends out ICP "probes" to -# count how many other peers are listening on the given multicast -# address. This value specifies how long Squid should wait to -# count all the replies. The default is 2000 msec, or 2 -# seconds. -# -#Default: -# mcast_icp_query_timeout 2000 - - -# INTERNAL ICON OPTIONS -# ----------------------------------------------------------------------------- - -# TAG: icon_directory -# Where the icons are stored. These are normally kept in -# /usr/share/squid/icons -# -#Default: -# icon_directory /usr/share/squid/icons - -# TAG: global_internal_static -# This directive controls is Squid should intercept all requests for -# /squid-internal-static/ no matter which host the URL is requesting -# (default on setting), or if nothing special should be done for -# such URLs (off setting). The purpose of this directive is to make -# icons etc work better in complex cache hierarchies where it may -# not always be possible for all corners in the cache mesh to reach -# the server generating a directory listing. -# -#Default: -# global_internal_static on - -# TAG: short_icon_urls -# If this is enabled Squid will use short URLs for icons. -# -# If off the URLs for icons will always be absolute URLs -# including the proxy name and port. -# -#Default: -# short_icon_urls off - - -# ERROR PAGE OPTIONS -# ----------------------------------------------------------------------------- - -# TAG: error_directory -# If you wish to create your own versions of the default -# (English) error files, either to customize them to suit your -# language or company copy the template English files to another -# directory and point this tag at them. -# -# The squid developers are interested in making squid available in -# a wide variety of languages. If you are making translations for a -# langauge that Squid does not currently provide please consider -# contributing your translation back to the project. -# -#Default: -# error_directory /usr/share/squid/errors/en - -# TAG: error_map -# Map errors to custom messages -# -# error_map message_url http_status ... -# -# http_status ... is a list of HTTP status codes or Squid error -# messages. -# -# Use in accelerators to substitute the error messages returned -# by servers with other custom errors. -# -# error_map http://your.server/error/404.shtml 404 -# -# Requests for error messages is a GET request for the configured -# URL with the following special headers -# -# X-Error-Status: The received HTTP status code (i.e. 404) -# X-Request-URI: The requested URI where the error occurred -# -# In Addition the following headers are forwarded from the client -# request: -# -# User-Agent, Cookie, X-Forwarded-For, Via, Authorization, -# Accept, Referer -# -# And the following headers from the server reply: -# -# Server, Via, Location, Content-Location -# -# The reply returned to the client will carry the original HTTP -# headers from the real error message, but with the reply body -# of the configured error message. -# -# -#Default: -# none - -# TAG: err_html_text -# HTML text to include in error messages. Make this a "mailto" -# URL to your admin address, or maybe just a link to your -# organizations Web page. -# -# To include this in your error messages, you must rewrite -# the error template files (found in the "errors" directory). -# Wherever you want the 'err_html_text' line to appear, -# insert a %L tag in the error template file. -# -#Default: -# none - -# TAG: deny_info -# Usage: deny_info err_page_name acl -# or deny_info http://... acl -# Example: deny_info ERR_CUSTOM_ACCESS_DENIED bad_guys -# -# This can be used to return a ERR_ page for requests which -# do not pass the 'http_access' rules. Squid remembers the last -# acl it evaluated in http_access, and if a 'deny_info' line exists -# for that ACL Squid returns a corresponding error page. -# -# The acl is typically the last acl on the http_access deny line which -# denied access. The exceptions to this rule are: -# - When Squid needs to request authentication credentials. It's then -# the first authentication related acl encountered -# - When none of the http_access lines matches. It's then the last -# acl processed on the last http_access line. -# -# You may use ERR_ pages that come with Squid or create your own pages -# and put them into the configured errors/ directory. -# -# Alternatively you can specify an error URL. The browsers will -# get redirected (302) to the specified URL. %s in the redirection -# URL will be replaced by the requested URL. -# -# Alternatively you can tell Squid to reset the TCP connection -# by specifying TCP_RESET. -# -#Default: -# none - - -# OPTIONS INFLUENCING REQUEST FORWARDING -# ----------------------------------------------------------------------------- - -# TAG: nonhierarchical_direct -# By default, Squid will send any non-hierarchical requests -# (matching hierarchy_stoplist or not cacheable request type) direct -# to origin servers. -# -# If you set this to off, Squid will prefer to send these -# requests to parents. -# -# Note that in most configurations, by turning this off you will only -# add latency to these request without any improvement in global hit -# ratio. -# -# If you are inside an firewall see never_direct instead of -# this directive. -# -#Default: -# nonhierarchical_direct on - -# TAG: prefer_direct -# Normally Squid tries to use parents for most requests. If you for some -# reason like it to first try going direct and only use a parent if -# going direct fails set this to on. -# -# By combining nonhierarchical_direct off and prefer_direct on you -# can set up Squid to use a parent as a backup path if going direct -# fails. -# -# Note: If you want Squid to use parents for all requests see -# the never_direct directive. prefer_direct only modifies how Squid -# acts on cacheable requests. -# -#Default: -# prefer_direct off - -# TAG: ignore_ims_on_miss on|off -# This options makes Squid ignore If-Modified-Since on -# cache misses. This is useful while the cache is -# mostly empty to more quickly have the cache populated. -# -#Default: -# ignore_ims_on_miss off - -# TAG: always_direct -# Usage: always_direct allow|deny [!]aclname ... -# -# Here you can use ACL elements to specify requests which should -# ALWAYS be forwarded by Squid to the origin servers without using -# any peers. For example, to always directly forward requests for -# local servers ignoring any parents or siblings you may have use -# something like: -# -# acl local-servers dstdomain my.domain.net -# always_direct allow local-servers -# -# To always forward FTP requests directly, use -# -# acl FTP proto FTP -# always_direct allow FTP -# -# NOTE: There is a similar, but opposite option named -# 'never_direct'. You need to be aware that "always_direct deny -# foo" is NOT the same thing as "never_direct allow foo". You -# may need to use a deny rule to exclude a more-specific case of -# some other rule. Example: -# -# acl local-external dstdomain external.foo.net -# acl local-servers dstdomain .foo.net -# always_direct deny local-external -# always_direct allow local-servers -# -# NOTE: If your goal is to make the client forward the request -# directly to the origin server bypassing Squid then this needs -# to be done in the client configuration. Squid configuration -# can only tell Squid how Squid should fetch the object. -# -# NOTE: This directive is not related to caching. The replies -# is cached as usual even if you use always_direct. To not cache -# the replies see no_cache. -# -# This option replaces some v1.1 options such as local_domain -# and local_ip. -# -#Default: -# none - -# TAG: never_direct -# Usage: never_direct allow|deny [!]aclname ... -# -# never_direct is the opposite of always_direct. Please read -# the description for always_direct if you have not already. -# -# With 'never_direct' you can use ACL elements to specify -# requests which should NEVER be forwarded directly to origin -# servers. For example, to force the use of a proxy for all -# requests, except those in your local domain use something like: -# -# acl local-servers dstdomain .foo.net -# acl all src 0.0.0.0/0.0.0.0 -# never_direct deny local-servers -# never_direct allow all -# -# or if Squid is inside a firewall and there are local intranet -# servers inside the firewall use something like: -# -# acl local-intranet dstdomain .foo.net -# acl local-external dstdomain external.foo.net -# always_direct deny local-external -# always_direct allow local-intranet -# never_direct allow all -# -# This option replaces some v1.1 options such as inside_firewall -# and firewall_ip. -# -#Default: -# none - - -# ADVANCED NETWORKING OPTIONS -# ----------------------------------------------------------------------------- - -# TAG: max_filedescriptors -# The maximum number of filedescriptors supported. -# -# The default "0" means Squid inherits the current ulimit setting. -# -# Note: Changing this requires a restart of Squid. Also -# not all comm loops supports values larger than --with-maxfd. -# -#Default: -# max_filedescriptors 0 - -# TAG: accept_filter -# FreeBSD: -# -# The name of an accept(2) filter to install on Squid's -# listen socket(s). This feature is perhaps specific to -# FreeBSD and requires support in the kernel. -# -# The 'httpready' filter delays delivering new connections -# to Squid until a full HTTP request has been received. -# See the accf_http(9) man page for details. -# -# The 'dataready' filter delays delivering new connections -# to Squid until there is some data to process. -# See the accf_dataready(9) man page for details. -# -# Linux: -# -# The 'data' filter delays delivering of new connections -# to Squid until there is some data to process by TCP_ACCEPT_DEFER. -# You may optionally specify a number of seconds to wait by -# 'data=N' where N is the number of seconds. Defaults to 30 -# if not specified. See the tcp(7) man page for details. -#EXAMPLE: -## FreeBSD -#accept_filter httpready -## Linux -#accept_filter data -# -#Default: -# none - -# TAG: tcp_recv_bufsize (bytes) -# Size of receive buffer to set for TCP sockets. Probably just -# as easy to change your kernel's default. Set to zero to use -# the default buffer size. -# -#Default: -# tcp_recv_bufsize 0 bytes - -# TAG: incoming_rate -# This directive controls how aggressive Squid should accept new -# connections compared to processing existing connections. -# The lower number the more frequent Squid will look for new -# incoming requests. -# -#Default: -# incoming_rate 30 - - -# DNS OPTIONS -# ----------------------------------------------------------------------------- - -# TAG: check_hostnames -# For security and stability reasons Squid by default checks -# hostnames for Internet standard RFC compliance. If you do not want -# Squid to perform these checks then turn this directive off. -# -#Default: -# check_hostnames on - -# TAG: allow_underscore -# Underscore characters is not strictly allowed in Internet hostnames -# but nevertheless used by many sites. Set this to off if you want -# Squid to be strict about the standard. -# This check is performed only when check_hostnames is set to on. -# -#Default: -# allow_underscore on - -# TAG: cache_dns_program -# Note: This option is only available if Squid is rebuilt with the -# --disable-internal-dns option -# -# Specify the location of the executable for dnslookup process. -# -#Default: -# cache_dns_program /usr/lib/squid/dnsserver - -# TAG: dns_children -# Note: This option is only available if Squid is rebuilt with the -# --disable-internal-dns option -# -# The number of processes spawn to service DNS name lookups. -# For heavily loaded caches on large servers, you should -# probably increase this value to at least 10. The maximum -# is 32. The default is 5. -# -# You must have at least one dnsserver process. -# -#Default: -# dns_children 5 - -# TAG: dns_retransmit_interval -# Initial retransmit interval for DNS queries. The interval is -# doubled each time all configured DNS servers have been tried. -# -# -#Default: -# dns_retransmit_interval 5 seconds - -# TAG: dns_timeout -# DNS Query timeout. If no response is received to a DNS query -# within this time all DNS servers for the queried domain -# are assumed to be unavailable. -# -#Default: -# dns_timeout 2 minutes - -# TAG: dns_defnames on|off -# Normally the RES_DEFNAMES resolver option is disabled -# (see res_init(3)). This prevents caches in a hierarchy -# from interpreting single-component hostnames locally. To allow -# Squid to handle single-component names, enable this option. -# -#Default: -# dns_defnames off - -# TAG: dns_nameservers -# Use this if you want to specify a list of DNS name servers -# (IP addresses) to use instead of those given in your -# /etc/resolv.conf file. -# On Windows platforms, if no value is specified here or in -# the /etc/resolv.conf file, the list of DNS name servers are -# taken from the Windows registry, both static and dynamic DHCP -# configurations are supported. -# -# Example: dns_nameservers 10.0.0.1 192.172.0.4 -# -#Default: -# none - -# TAG: hosts_file -# Location of the host-local IP name-address associations -# database. Most Operating Systems have such a file on different -# default locations: -# - Un*X & Linux: /etc/hosts -# - Windows NT/2000: %SystemRoot%\system32\drivers\etc\hosts -# (%SystemRoot% value install default is c:\winnt) -# - Windows XP/2003: %SystemRoot%\system32\drivers\etc\hosts -# (%SystemRoot% value install default is c:\windows) -# - Windows 9x/Me: %windir%\hosts -# (%windir% value is usually c:\windows) -# - Cygwin: /etc/hosts -# -# The file contains newline-separated definitions, in the -# form ip_address_in_dotted_form name [name ...] names are -# whitespace-separated. Lines beginning with an hash (#) -# character are comments. -# -# The file is checked at startup and upon configuration. -# If set to 'none', it won't be checked. -# If append_domain is used, that domain will be added to -# domain-local (i.e. not containing any dot character) host -# definitions. -# -#Default: -# hosts_file /etc/hosts -# -hosts_file /etc/hosts - -# TAG: dns_testnames -# The DNS tests exit as soon as the first site is successfully looked up -# -# This test can be disabled with the -D command line option. -# -#Default: -# dns_testnames netscape.com internic.net nlanr.net microsoft.com - -# TAG: append_domain -# Appends local domain name to hostnames without any dots in -# them. append_domain must begin with a period. -# -# Be warned there are now Internet names with no dots in -# them using only top-domain names, so setting this may -# cause some Internet sites to become unavailable. -# -#Example: -# append_domain .yourdomain.com -# -#Default: -# none - -# TAG: ignore_unknown_nameservers -# By default Squid checks that DNS responses are received -# from the same IP addresses they are sent to. If they -# don't match, Squid ignores the response and writes a warning -# message to cache.log. You can allow responses from unknown -# nameservers by setting this option to 'off'. -# -#Default: -# ignore_unknown_nameservers on - -# TAG: ipcache_size (number of entries) -# TAG: ipcache_low (percent) -# TAG: ipcache_high (percent) -# The size, low-, and high-water marks for the IP cache. -# -#Default: -# ipcache_size 1024 -# ipcache_low 90 -# ipcache_high 95 - -# TAG: fqdncache_size (number of entries) -# Maximum number of FQDN cache entries. -# -#Default: -# fqdncache_size 1024 - - -# MISCELLANEOUS -# ----------------------------------------------------------------------------- - -# TAG: memory_pools on|off -# If set, Squid will keep pools of allocated (but unused) memory -# available for future use. If memory is a premium on your -# system and you believe your malloc library outperforms Squid -# routines, disable this. -# -#Default: -# memory_pools on - -# TAG: memory_pools_limit (bytes) -# Used only with memory_pools on: -# memory_pools_limit 50 MB -# -# If set to a non-zero value, Squid will keep at most the specified -# limit of allocated (but unused) memory in memory pools. All free() -# requests that exceed this limit will be handled by your malloc -# library. Squid does not pre-allocate any memory, just safe-keeps -# objects that otherwise would be free()d. Thus, it is safe to set -# memory_pools_limit to a reasonably high value even if your -# configuration will use less memory. -# -# If set to zero, Squid will keep all memory it can. That is, there -# will be no limit on the total amount of memory used for safe-keeping. -# -# To disable memory allocation optimization, do not set -# memory_pools_limit to 0. Set memory_pools to "off" instead. -# -# An overhead for maintaining memory pools is not taken into account -# when the limit is checked. This overhead is close to four bytes per -# object kept. However, pools may actually _save_ memory because of -# reduced memory thrashing in your malloc library. -# -#Default: -# memory_pools_limit 5 MB - -# TAG: forwarded_for on|off -# If set, Squid will include your system's IP address or name -# in the HTTP requests it forwards. By default it looks like -# this: -# -# X-Forwarded-For: 192.1.2.3 -# -# If you disable this, it will appear as -# -# X-Forwarded-For: unknown -# -#Default: -# forwarded_for on - -# TAG: cachemgr_passwd -# Specify passwords for cachemgr operations. -# -# Usage: cachemgr_passwd password action action ... -# -# Some valid actions are (see cache manager menu for a full list): -# 5min -# 60min -# asndb -# authenticator -# cbdata -# client_list -# comm_incoming -# config * -# counters -# delay -# digest_stats -# dns -# events -# filedescriptors -# fqdncache -# histograms -# http_headers -# info -# io -# ipcache -# mem -# menu -# netdb -# non_peers -# objects -# offline_toggle * -# pconn -# peer_select -# reconfigure * -# redirector -# refresh -# server_list -# shutdown * -# store_digest -# storedir -# utilization -# via_headers -# vm_objects -# -# * Indicates actions which will not be performed without a -# valid password, others can be performed if not listed here. -# -# To disable an action, set the password to "disable". -# To allow performing an action without a password, set the -# password to "none". -# -# Use the keyword "all" to set the same password for all actions. -# -#Example: -# cachemgr_passwd secret shutdown -# cachemgr_passwd lesssssssecret info stats/objects -# cachemgr_passwd disable all -# -#Default: -# none - -# TAG: client_db on|off -# If you want to disable collecting per-client statistics, -# turn off client_db here. -# -#Default: -# client_db on - -# TAG: reload_into_ims on|off -# When you enable this option, client no-cache or ``reload'' -# requests will be changed to If-Modified-Since requests. -# Doing this VIOLATES the HTTP standard. Enabling this -# feature could make you liable for problems which it -# causes. -# -# see also refresh_pattern for a more selective approach. -# -#Default: -# reload_into_ims off - -# TAG: maximum_single_addr_tries -# This sets the maximum number of connection attempts for a -# host that only has one address (for multiple-address hosts, -# each address is tried once). -# -# The default value is one attempt, the (not recommended) -# maximum is 255 tries. A warning message will be generated -# if it is set to a value greater than ten. -# -# Note: This is in addition to the request re-forwarding which -# takes place if Squid fails to get a satisfying response. -# -#Default: -# maximum_single_addr_tries 1 - -# TAG: retry_on_error -# If set to on Squid will automatically retry requests when -# receiving an error response. This is mainly useful if you -# are in a complex cache hierarchy to work around access -# control errors. -# -#Default: -# retry_on_error off - -# TAG: as_whois_server -# WHOIS server to query for AS numbers. NOTE: AS numbers are -# queried only when Squid starts up, not for every request. -# -#Default: -# as_whois_server whois.ra.net -# as_whois_server whois.ra.net - -# TAG: offline_mode -# Enable this option and Squid will never try to validate cached -# objects. -# -#Default: -# offline_mode off - -# TAG: uri_whitespace -# What to do with requests that have whitespace characters in the -# URI. Options: -# -# strip: The whitespace characters are stripped out of the URL. -# This is the behavior recommended by RFC2396. -# deny: The request is denied. The user receives an "Invalid -# Request" message. -# allow: The request is allowed and the URI is not changed. The -# whitespace characters remain in the URI. Note the -# whitespace is passed to redirector processes if they -# are in use. -# encode: The request is allowed and the whitespace characters are -# encoded according to RFC1738. This could be considered -# a violation of the HTTP/1.1 -# RFC because proxies are not allowed to rewrite URI's. -# chop: The request is allowed and the URI is chopped at the -# first whitespace. This might also be considered a -# violation. -# -#Default: -# uri_whitespace strip - -# TAG: coredump_dir -# By default Squid leaves core files in the directory from where -# it was started. If you set 'coredump_dir' to a directory -# that exists, Squid will chdir() to that directory at startup -# and coredump files will be left there. -# -#Default: -# coredump_dir none -# -# Leave coredumps in the first cache dir -coredump_dir /var/spool/squid - -# TAG: chroot -# Use this to have Squid do a chroot() while initializing. This -# also causes Squid to fully drop root privileges after -# initializing. This means, for example, if you use a HTTP -# port less than 1024 and try to reconfigure, you will may get an -# error saying that Squid can not open the port. -# -#Default: -# none - -# TAG: balance_on_multiple_ip -# Some load balancing servers based on round robin DNS have been -# found not to preserve user session state across requests -# to different IP addresses. -# -# By default Squid rotates IP's per request. By disabling -# this directive only connection failure triggers rotation. -# -#Default: -# balance_on_multiple_ip on - -# TAG: pipeline_prefetch -# To boost the performance of pipelined requests to closer -# match that of a non-proxied environment Squid can try to fetch -# up to two requests in parallel from a pipeline. -# -# Defaults to off for bandwidth management and access logging -# reasons. -# -#Default: -# pipeline_prefetch off - -# TAG: high_response_time_warning (msec) -# If the one-minute median response time exceeds this value, -# Squid prints a WARNING with debug level 0 to get the -# administrators attention. The value is in milliseconds. -# -#Default: -# high_response_time_warning 0 - -# TAG: high_page_fault_warning -# If the one-minute average page fault rate exceeds this -# value, Squid prints a WARNING with debug level 0 to get -# the administrators attention. The value is in page faults -# per second. -# -#Default: -# high_page_fault_warning 0 - -# TAG: high_memory_warning -# If the memory usage (as determined by mallinfo) exceeds -# this amount, Squid prints a WARNING with debug level 0 to get -# the administrators attention. -# -#Default: -# high_memory_warning 0 KB - -# TAG: sleep_after_fork (microseconds) -# When this is set to a non-zero value, the main Squid process -# sleeps the specified number of microseconds after a fork() -# system call. This sleep may help the situation where your -# system reports fork() failures due to lack of (virtual) -# memory. Note, however, if you have a lot of child -# processes, these sleep delays will add up and your -# Squid will not service requests for some amount of time -# until all the child processes have been started. -# On Windows value less then 1000 (1 milliseconds) are -# rounded to 1000. -# -#Default: -# sleep_after_fork 0 - -# TAG: zero_buffers on|off -# Squid by default will zero all buffers before using or reusing them. -# Setting this to 'off' will result in fixed-sized temporary buffers -# not being zero'ed. This may give a performance boost on certain -# platforms but it may result in undefined behaviour at the present -# time. -# -#Default: -# zero_buffers on - -# TAG: windows_ipaddrchangemonitor on|off -# On Windows Squid by default will monitor IP address changes and will -# reconfigure itself after any detected event. This is very useful for -# proxies connected to internet with dial-up interfaces. -# In some cases (a Proxy server acting as VPN gateway is one) it could be -# desiderable to disable this behaviour setting this to 'off'. -# Note: after changing this, Squid service must be restarted. -# -#Default: -# windows_ipaddrchangemonitor on - |