Any IPChains Gurus out there? Got a simple question for ya. I have a server machine that I'd like to do routing for two other servers. The first machine has three network cards as follows:

eth0 - - ADSL connection to ISP
eth1 - - masquerades for rest of internal network
eth2 - - link to the other servers

I know I need to add some IP chains rules to set up forwarding and I've read the IPChains HOWTO, but for some reason, I just didn't seem to understand what I need to do. How do I tell eth2 to forward packets to eth1 and from there on out and vice versa?