Good evening,
i'm new here and would greatly appreciate if you helped me with the following: I need to setup an environment where a pc (from now on reffered to as PC-A running Windows XP on a virtual machine) has its internet connection limited because it goes through a PC that acts as a firewall (from now on reffered to as PC-B). PC-B is running Backtrack R5 on a virtual machine and has to work (as a firewall) using iptables and squid (on port 3128).

Problem is, i can't get PC-A to connect through PC-B to the network. Also, i'd prefer not to use XP's system-wide network proxy configuration because it can be bypassed by Mozilla Firefox without much effor (Correct me if i'm wrong). Any help is welcome.

Thanks in advance,