Forward a wired network
 

Hi! I'm running Slackware 12 on my server and I need to forward the network from eth0 to eth1. Eth1 is connected to my windows box.

Well you need to really need to expand a lot on your post, but you used "bridge" in the tag there so I guess you want a bridge not a router, in which case start by checking the bridge howto and come back if you have any more specific questions.