Squid – Sample configuration file

Quick setup configuration file for Squid proxy server. Make backup of your existing squid.conf and replace the contents with following, service squid restart, you will be good to go. Squid will restart in transparent proxy mode.

Cheers!

acl manager proto cache_object
acl localhost src 127.0.0.1/32
acl to_localhost dst 127.0.0.0/8

# 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 localnet src fc00::/7                 # RFC 4193 local private network range
acl localnet src fe80::/10              # RFC 4291 link-local (directly plugged) machines

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

# Skipp local server caching
acl mydomain dstdomain .mydomain.com
cache deny mydomain

#
# Recommended minimum Access Permission configuration:
#
# Only allow cachemgr access from localhost
http_access allow manager localhost
http_access deny manager

# Deny requests to certain unsafe ports
http_access deny !Safe_ports

# Deny CONNECT to other than secure 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

#Allow ICP queries from local networks only
icp_access allow localnet
icp_access deny all

#Allow HTCP queries from local networks only
htcp_access allow localnet
htcp_access deny all

# Squid normally listens to port 3128
http_port 3128 transparent

# We recommend you to use at least the following line.
hierarchy_stoplist cgi-bin ?

# Uncomment and adjust the following to add a disk cache directory.
cache_dir ufs /var/spool/squid 32768 32 512

# Leave coredumps in the first cache dir

icp_port 3130
coredump_dir /var/spool/squid

# Additional Cache tweaks
cache_mem 2048 MB
maximum_object_size_in_memory 256 KB
maximum_object_size 64 MB
access_log /var/log/squid/access.log squid
logfile_rotate 10

#Suggested default:
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

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