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acl all src 0.0.0.0/0.0.0.0
acl manager proto cache_object
acl localhost src 127.0.0.1/255.255.255.255
acl to_localhost dst 127.0.0.0/8
acl SSL_ports port 443
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 CONNECT method CONNECT
#Default:
http_access deny all
#
#Recommended minimum configuration:
#
# Only allow cachemgr access from localhost
http_access allow manager localhost
http_access deny manager
# 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
# to list your (internal) IP networks from where browsing should
# be allowed
#acl our_networks src 192.168.1.0/24 192.168.2.0/24
#http_access allow our_networks
# And finally deny all other access to this proxy
http_access allow localhost
http_access deny all
#Default:
# icp_access deny all
#
#Allow ICP queries from everyone
icp_access allow all
# Squid normally listens to port 3128
http_port 3128 transparent
#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 ?
#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.
#
# Note: 2.6.STABLE14 and earlier only supports a slightly different
# and undocumented format with all uppercase LOG_FACILITY|LOG_PRIORITY
access_log /var/log/squid/access.log squid
# 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
#We recommend you to use the following two lines.
acl QUERY urlpath_regex cgi-bin \?
cache deny QUERY
# 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
Squid is not a firewall. Squid is not a firewall. Squid is not a firewall. Squid is not a firewall.
So, if you have a machine with two eth ports, so that you can separate the networks, and you have a firewall, adding squid to this can give you the ability to force your users to go through the squid auth.
Otherwise, there will always be a way around it although maybe you think that your users aren't smart enough to find it. Do you want to bet on that, though.
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