Hi, please forgive this most probably very simple question, but I cannot find
the correct configuration file to enable routing...

I have two PCs, one HAS a internet connection to the internet-proxy, the
 other one hasn't.
The internet-pc (and I do not mean the proxy-pc) has two ethernet devices,
 ra0 and eth0.

eth0 connects it with the non-internet pc.

I set up a route to the internet-proxy-px on the internet-pc and it works
 fine on it, but the the non-internet pc can't use it!

Even though the non-internet pc has it's default gw set to the eth0 ip of the
internet pc.

Thanks for your help.