From: "john papadeas" <zygos23 at yahoo dot com>

> anyone know how i can redirect any in/out traffic on a
> specific port to another gateway ?
> e.g. anything on port 80 will be redirected to another
> internet gateway and everything else wil remain on
> m0n0 internet gateway

Search the archives for this code.  I have talked about it a few times, and 
others as well.

                        Lee
 <nat>
 <rule>
  <protocol>tcp</protocol>
  <external-port>25</external-port>
  <target>192.168.1.5</target>
  <local-port>25</local-port>
  <interface>lan</interface>
  <descr>redirect SMTP to LAN SMTP server</descr>
 </rule>
 </nat>