*nix firewall setup

I have a client who has MS proxy server 2.0 and a NAT firewall. I have already been able to exploit it. I am recommending they get a regular firewall put in place and dump all the rest. They however dont want to spend too much $$ on the project so I was thinking why ont a linux firewall?

Having never set one up before and only having a little knowledge of linux where can I go to get a basic tutorial that just covers firewalls and linux. I know there are a million pages of text out there on linux and firewalls but i am under a slight time constraint and need a step by step with explanations or something similar for now.

Any1 know of any sites or texts to get that would do this?

TIA kenderkin Received on Tue Nov 26 20:17:04 2002