Setup Squid Proxy on Ubuntu

• Refer Squid Setup for ubuntu Guide for setting up the squid proxy.

Transparent Proxy

Perform following modifications to your "/etc/squid3/squid.conf"

modify default port of your http proxy from 3128 to 8888

#http_port 3128 
http_port 8888

Modify config to allow all the traffic to pass through the proxy.

http_access allow all
#http_access allow manager localhost
#http_access deny manager

Run following command for restarting squid3.

$ sudo service squid3 restart

NCSA Username/Password Authentication

create squid_passwd file and add the test user

• A nice guide to setup squid with NCSA

# Create squid_passwd file
$ touch /etc/squid3/squid_passwd
$ chmod o+r /etc/squid3/squid_passwd

# Adding user "test"
htpasswd /etc/squid/squid_passwd test
New password:
Re-type new password:
Adding password for user test

# find your ncsa_auth file
$ locate ncsa_auth
/usr/lib/squid3/ncsa_auth

Now we need to change the config as per below.. the order of the statement matters.

#
# Add this to the auth_param section of squid.conf
#
auth_param basic program /usr/lib/squid3/ncsa_auth /etc/squid3/squid_passwd
 
#
# Add this to the bottom of the ACL section of squid.conf
#
acl ncsa_users proxy_auth REQUIRED
 
#
# Add this at the top of the http_access section of squid.conf
#
http_access allow ncsa_users

Run following command for restarting squid3.

$ sudo service squid3 restart