Greetings all, I am trying to setup a test for using a linux machine as a router, using IP tables. I am very new to linux and will have alot of questions, but I will bring them up as they come along. Now: I have two ethernet cards (eth0, eth1) a windows machine and the rest of the internet are connected to eth0, and another windows machine is connected to eth1. When I set this up I lost my internet connection on linux, and consequently on eth1. I've asigned two different IP's to both cards and Through webmin, I asigned eth0 as the default route. I am very new to linux and am probably doing something very wrong. Please help! Thanks, Kid Robot

Sounds like you need to set up a bridge between the two cards. Check out some of the docs here: http://www.tldp.org/HOWTO/HOWTO-INDEX/networking.html especially the bidging and firewall howtos

if you want to use linux as a router i would highly recommend smoothwall: www.smoothwall.org It would be better to have a separate maching for this: 2 ether net cards - one to t'internet and one to a hub - then run windows machines off that. :-) smoothwall is 40mb by the way! and has a grewat guide in with it