squid.conf

# General

http_port 3128
visible_hostname Proxy
forwarded_for delete
via off
dns_v4_first on

# Log

access_log /var/log/squid/access.log squid
cache_log /var/log/squid/cache.log squid
cache_store_log /var/log/squid/store.log
access_log daemon:/var/log/squid/access.log squid
logformat languagelog %{Accept-Language}>h
access_log /var/log/squid/languages.log languagelog

# Cache
cache_dir aufs /var/cache/squid 1024 16 256
coredump_dir /var/spool/squid

acl QUERY urlpath_regex cgi-bin \?
cache deny QUERY

refresh_pattern ^ftp:           1440    20%     10080
refresh_pattern ^gopher:        1440    0%      1440
refresh_pattern -i (/cgi-bin/|\?) 0     0%      0
refresh_pattern .               0       20%     4320

# Network ACL

acl localnet src 10.0.0.0/8     # RFC 1918 possible internal network
acl localnet src 192.168.137.0/24  # RFC 1918 possible internal network
acl localnet src 192.168.1.0/24 # RFC 1918 possible internal network
acl localnet src 192.168.218.0/24 # RFC 1918 possible internal network
acl localnet src fc00::/7       # RFC 4193 local private network range
acl localnet src fe80::/10      # RFC 4291 link-local (directly plugged) machines

# Port ACL

acl SSL_ports port 443          # https
acl SSL_ports port 563          # snews
acl SSL_ports port 873          # rync
acl Safe_ports port 80 8080     # http
acl Safe_ports port 21          # ftp
acl Safe_ports port 443 563     # 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 purge method PURGE
acl CONNECT method CONNECT

# Authentication
#   Uncomment the following lines to enable file based authentication BUT:
#   The following section requires to have squid libs installed, especially `nsca_auth`, to be working.
#   This sections uses a Htpasswd file named `users.pwd` file to store eligible accounts.
#   You can generate yours at http://www.htaccesstools.com/htpasswd-generator/

#auth_param basic program /usr/lib/squid/ncsa_auth /etc/squid/users.pwd
#auth_param basic children 5
#auth_param basic realm Proxy
#auth_param basic credentialsttl 2 hours

#acl users proxy_auth REQUIRED
#acl auth proxy_auth REQUIRED

# ADMINISTRATIVE PARAMETERS
# -----------------------------------------------------------------------------
cache_mgr agratitudesign
cache_effective_user proxy
cache_effective_group proxy
httpd_suppress_version_string on
visible_hostname localhost

#http_access allow users

# Access Restrictions

http_access allow manager localhost
http_access deny manager

http_access allow purge localhost
http_access deny purge

http_access deny !Safe_ports
http_access deny CONNECT !SSL_ports

http_reply_access allow all
htcp_access deny all
icp_access allow all
always_direct allow all

# Request Headers Forcing

request_header_access Allow allow all
request_header_access Authorization allow all
request_header_access WWW-Authenticate allow all
request_header_access Proxy-Authorization allow all
request_header_access Proxy-Authenticate allow all
request_header_access Cache-Control allow all
request_header_access Content-Encoding allow all
request_header_access Content-Length allow all
request_header_access Content-Type allow all
request_header_access Date allow all
request_header_access Expires allow all
request_header_access Host allow all
request_header_access If-Modified-Since allow all
request_header_access Last-Modified allow all
request_header_access Location allow all
request_header_access Pragma allow all
request_header_access Accept allow all
request_header_access Accept-Charset allow all
request_header_access Accept-Encoding allow all
request_header_access Accept-Language allow all
request_header_access Content-Language allow all
request_header_access Mime-Version allow all
request_header_access Retry-After allow all
request_header_access Title allow all
request_header_access Connection allow all
request_header_access Proxy-Connection allow all
request_header_access User-Agent allow all
request_header_access Cookie allow all
request_header_access All deny all

# Response Headers Spoofing
reply_header_access Via deny all
reply_header_access X-Cache deny all
reply_header_access X-Cache-Lookup deny all

squid3 conf file

squid3.4 conf for transparent proxy without user authentification