Port forwarding in Windows Server 2003

Posted on 2008-06-26
Last Modified: 2010-04-21
I connected a SlingBox player ( ) on my LAN, the server assigned a DHCP Address but in order for me to remote access it , I need to forward requests on port 5001 to that device, I know how to do that on the router but not on the server. The router is a very basic one and it does not port forward, all I could do was put the server on DMZ. I know I can go to slingmedia but I also have a surveillance system that needs 4 ports forwarded to it for remote access.
Question by:carloslaso
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LVL 58

Expert Comment

ID: 21878392
What type of configuration do you have your network configured in? Does the Windows Server 2003 server act as a router with 2 NICs - so all traffic from the LAN and to the Internet passes through the server?

If the server has 2 NICs, you'll need to use the Routing and Remote Access console to do your port forward. I expect you are using the router on your network as your gateway for all local clients, in which case, the only device which needs ports forwarding to is on the router, pointing to the IP address of the SlingBox.

Author Comment

ID: 21878434
The server has 2 NICs and one of them is for local traffic, the other gives internet access. The slingbox detects the local traffic NIC as the network to use.
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Expert Comment

ID: 21878487
It that case, you'll need to configure Network Address Translation (NAT) through RRAS. Detailed guide on the required procedure is at

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Author Comment

ID: 21878663
Will the server know what ports those devices need when being remote accessed?
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Accepted Solution

tigermatt earned 500 total points
ID: 21878737
Actually, that guide isn't the correct guide to follow. You need to install RRAS and configure it with NAT/Basic Firewall functionality - that part is correct. However, once it is installed, you create the rule in the firewall to forward the port as per

Open RRAS>IP Routing>NAT, right-click external NIC>Properties>Services and ports, select a service or add a port. To forward to an internal IP, type IP address in Private address.

That forwards the ports to the correct IP of the SlingBox on the LAN. You tell RRAS the port you are forwarding. If necessary, you will have to allow the port through the router's firewall to the IP of the external NIC on the Server too.

Author Closing Comment

ID: 31471157
This page never ceases to amaze me with the answers by the experts.
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Expert Comment

ID: 21878858
>>> "This page never ceases to amaze me with the answers by the experts."

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