Routing between 2 interfaces only, on a server with 3 interfaces

I have a Windows Server 2003 standard installation, which has three network interfaces available (and used).

I want to set up IP routing using RRAS between two of the interfaces, whilst leaving the third unrouted.

I've enabled RRAS and configured it to route between LANs, but how do I isolate the third interface?

The interfaces are configured as follows:

LAN1 192.168.100.0/24
LAN2 192.168.2.0/24
LAN3 172.31.2.0/24

I want interfaces LAN1 & LAN3 to be routed, but for LAN2 to be completely isolated.

asked Nov 14 '11 at 12:20

Bryan
4,00621840

93% accept rate

	Is the 3rd interface on a different subnet? – gravyface Nov 14 '11 at 12:30
	Yes, all interfaces are on their own subnets. I'll update the question to reflect this. – Bryan Nov 14 '11 at 12:32
	And the problem is that, when RRAS is enabled, the server routes for all interfaces/subnets? – gravyface Nov 14 '11 at 12:34
	Correct. There doesn't appear to be a way of disabling routing on a specific interface, or at least if there is, I'm not seeing it. – Bryan Nov 14 '11 at 12:37
	That's likely by design since there's a route already for that interface, RRAS will happily route between all interfaces. Windows firewall should allow you to drop traffic coming in on LAN1 or LAN3 with a destination of LAN2, though. Not 100% this is possible with Windows 2003's Windows Firewall; you'll have to test it. – gravyface Nov 14 '11 at 12:48

feedback

Know someone who can answer? Share a link to this question via email, Google+, Twitter, or Facebook.

asked	6 months ago
viewed	92 times