Squid as a transparent proxy
 

How could I set up a squid box to be a transparent proxy? I want to be able to have all web traffic that goes across the box to be authd by the squid ncsa.

thanks

Justyn

From memory, there are two parts to it. The first thing to do is to set up a rule on the firewall that redirects the traffic, and then you add a rule in the Squid config.

I use shorewall as a network firewall, and there were instructions on the site for transparent proxying. Don't know what the rule would be on raw iptables, but Google can probably tell you.

FWIW, transparent proxying doesn't work with SSL protocols, so it's not very useful in many environments.

The rule in squid.conf goes into /authenticate_program /usr/bin/pam_auth (adjust path and name according to what you use)