I'm trying to duplicate a Linux server configuration to a windows server 2008R2 box. Basicaly this linux server acts as a router, but it is doing its job with only 1 interface (1 NIC).

Here is the network configuration in place (I cannot change it) :

INTERNET <==> Router (local ip = <==> linux Server (ip :

The router is configured with a DMZ to, and only allow this IP to connect to internet (Cannot change this router configuration).

The linux server is configured with a default gateway to, with the option : "Act as router".

All other computer on the lan have this configuration (given by DHCP) :

IP range : 194.168.0.X MASK : Default gateway :

And everything is working perfectly.

I'm trying to reproduce this way of routing with only one NIC from a windows server 2008R2, but it seems that you cannnot do it with only one NIC (all exemples I see are refering to 2 NIC with 2 different network).

Does someone have an idea how to achieved this in Windows server 2008R2 ?

Tx you for your help !



Routing only happens between two (or more) different networks. If you have only one NIC, then either your have a local virtual segment or you're using another kind of interface to connect to another network.

Your network diagram doesn't make a whole lot of sense either: you should have (at least) two interface per router, not one.

Could it be that you actually have bridged your "internet router" and your "linux router" ? That would explain it, then. Also, what's the internal IP range looks like ? is it a routable IP range or do you need NAT ?


You will need to enable the Routing and Remote access service and then use that to configure the same settings as your linux box.

  • 1
    That's what I tried, but without succes ... – Fabian Sep 14 '10 at 13:32
  • What results are you seeing? – Coding Gorilla Sep 14 '10 at 13:42
  • 1
    The client machine cannot reach any outside IP adress. – Fabian Sep 14 '10 at 13:57
  • 1
    Ping and tracert are not working either. When I look at the route table on the server i see the route definition (from :, submask :, destination :, correct NIC interface). It seems to be correct for me. – Fabian Sep 14 '10 at 14:04

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.