I have a Windows 2003 server which has one NIC with two networks configured on it. There are two logical networks sharing the same layer 2 domain.
How do I configure the server to route traffic between the two logical networks?
I think you are looking for Routing and Remote Access under Admin Tools.
Start up that and start the Configure and Enable Routing Wizard.
I believe you want to select Custom and LAN routing.
Hope this helps!
This seems like a good hit: http://articles.techrepublic.com.com/5100-10878_11-5844624.html