(List @ netfilter.org suggested that I post this here.) I have 2 machines (A & B) behind a Linux Firewall (FW). I have 2 ethernet cards on the FW - eth0 talks to the internet, eth1 talks to machines A & B. Machine A has lots of inbound & outbound traffic while machine B doesn't. It seems reasonable that I could add 2 new ethernet cards (eth2 & eth3) to the FW and by configuring iptables and/or routing tables force traffic on A to be handled by eth0/eth1 and traffic for B to be handled by eth2/eth3. Can I do this? If possible, can someone please give explicit details. Thankyou, Jeff Cordova