We recently aquired a practice that had a standing domain controller with 20 pcs on a 172.22.1.0 subnet and their main application was hosted on internal Term service RDP.
Traditionally when we move into a new building or practice we expand our network of 10.21.0.0 and join pcs or servers to our domain however in this case I cannot move their old servers/domain and term service to ours because of support reasons (previous contract still in place too much red tape) so I tried to keep the old domain/term servers running but on both subnets. I activated and connected the second nic cards in each server to our 10.21.0.0 network while keeping their orginal 172.22.1.0 in place on the first nic. The problem I face when I do this is that on some of the servers when I put in the 10.21.0.0 Gateway it drops any outside traffic coming from the 172.22.1.0 sub which is a problem and if I remove the GW on the 10.21.0.0 to keep the 172.22.1.0 working then of course nobody can reach the servers from outside our network.
How can I successfully add two Gateways on a Windows Server 2003 and 2008 so that it can receive outside traffic from both?
Any network gurus out there?