Hi all!

I've got a problem with my fathers network configuration, and I hope someone out there can give me a hint. I set up the following configuration:

I've got a LAN (192.168.217.*), lets call it PRECIOUSLAN. It consists of about 10 PCs. And I've got a second LAN, lets call it DMZLAN . It consists of two dsl routers (since we've got two dsl connections) and a debian server. In between DMZLAN and PRECIOUSLAN (which is the LAN I want to protect from the mean guys in the internet) there is a router that blocks everything going from DMZLAN to PRECIOUSLAN, but passes everything going the other way round.
So far so good. My problem is:

I want some of the PCs in PRECIOUSLAN to use provider 1, and the rest to use provider 2. Is there a good way to do this using the debian server? Is it difficult or did I miss something simple?

Thank you for help!

Valentin