title: How to set up squid_session with transparent proxy
body: <p>I want to set up a transparent squid proxy to monitor the same box it is running on. It needs to use squid_session to first force a login screen to the user, and then allow web browsing until an idle timeout. This is on Ubuntu 10.10, with squid 2.7. I'd like to use squid3 but I'm not sure it is well supported. A link to a tutorial for something like this would also be helpful, as I have not found anything very helpful. 
  Edit: my setup is: squid installed on computer A squid is a transparent proxy for computer A.</p>