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Title might be weird but I wanted to include all the factors involved.

I have a windows server 2008 r2 in a virtual network which has 2 networkadapters The settings are the following

Adapter 1 (connected to the internet)


Adapter 2 (used for passing dhcp to the clients and connected with Adapter 1 via NAT (RRAS)
Gateway: empty

With these settings I was able to connect to the domain called my.domain. I had internet at this point. Now the next I did was just shutting down the clients which I just added to the domain network.

I left for that day leaving the server on, and both clients off. I joined today again and I have the server connected with adapter 1 to the internet, and using adapter 2 to spread around DHCP without any problem.

However, I cannot connect to the internet on the clients anymore. When I troubleshoot the issue it tells me: The remote device or resource won't accept the connection

This cannot be a firewall issue because the firewalls are OFF on both machines.

What can I do now? I'm clueless. If you need more information I'll be glad to add it.

EDIT: The W7 has obtained these details:

Subnet Mask
Default gateway
DHCP Server
DNS Servers
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Is this also a domain controller? – pauska Oct 24 '12 at 7:20
yes, is this an issue? – Rob Oct 24 '12 at 7:23
Yes. Read this:… – pauska Oct 24 '12 at 7:25
Adding a second server now and configuring it as DC. Will check back later when I finish that task. – Rob Oct 24 '12 at 8:25

Disable DNS registration for the external network card (in the advanced TCP/IP settings), so that you won't get the external IP registered for the internal hostname. Client's can't talk to the external IP of the server when they want to contact the server.

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Thanks but this is not the solution for this issue. – Rob Oct 24 '12 at 8:25
@Robuust I take it that you have verified that your domain controller is not registered in your AD DNS zone with two different IP addresses? – pauska Oct 24 '12 at 8:26
I've found out that it won't work when DC + AD + DHCP + RRAS is added on 1 server. I separated both and now it works like a charm. DNS points to the DC/DNS Server now. – Rob Oct 25 '12 at 11:56
up vote 0 down vote accepted

As stated in comment by Pauska: Yes. Read this:… – pauska 4 hours ago

This was the problem. You cannot use NAT on a server which runs DHCP and a domain controller.

I've fixed this issue by seperating DHCP and NAT to its own server. So I changed the "all-in-one" server to 1 server with DHCP and NAT into the domain which was created by the other server. The second server uses Active Directory Domain Services now.

Thanks for the help.

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