Dual Independent Networks

[Kendrick Hamilton <kendrick.hamilton@sasktel.net>]

   I have a question for you. I hope you are the correct or a good 
person to ask this question of. I have a linux box with two ethernet 
interfaces. I would like them to be treated as two separate interfaces 
that are not hooked to the same network. Both interfaces should run 
Zeroconf and have independent IP address. The second ehternet address is 
on a private network from the first ehternet address. Currently I am not 
using iptables but could use it to do connection tracking. What is 
currently happening is
1. eth0 is configured and gets a zeroconf IP address.
2. routing tables set to route all outbound packets for zeroconf out eth0.
3. eth0 is working correctly
4. eth1 is configured and gets a different zeroconf IP address.
5. An incoming packet from eth1 is received and processed, since the 
response is to go out to a zeroconf IP address, the response goes out 
eth0. The computer connected on eth1 does not see the response.


Could this be solved with running IP tables and doing connection 
tracking? or is  more complex?

Thank You for your time and any help you can give
Kendrick Hamilton