Routing between three NIC and three Subnets

I’ve been having a heck of a time trying to get an x-server running panther to forward IP requests between three different subnets.

The server has three network cards on it. Here’s a diagram of the setup:

http://www.kbdiondemand.org/client_files/routingDiagram.png

I am trying to connect the 3.x subomain to the 1.x subdomain, and still have the NAT running sharing the 2.x subdomain.

I’m looking for some troubleshooting steps I can take to set this up. I haven’t had much success finding examples of other people who have done this.

I have looked into the routing tables, and I believe I have the correct routing setup.

Here is my routing table:
http://www.kbdiondemand.org/client_files/routing3.png”

I have been tinkering with the IFPW firewall settings, first trying a divert rule and then a fwd rule. Still no sucess.

Any books or websites or information to increase my learning would be helpful.

Here are some of the sites I have looked at:
http://www.oreillynet.com/pub/a/wireless/2003/11/25/nat_panther.html
http://www.mactech.com/articles/mactech/Vol.19/19.05/XserveasaRouter/index.html

Thank you.