Port forwarding

Posted on 2008-10-21
Medium Priority
Last Modified: 2012-05-05
I am a new user to experts exchange so if I miss out some crucial information then please forgive me.  I am trying to perform port forwarding using Server 2008 to forward internet traffic coming into our network to an internal web server listening on port 8080 (as we already have another webv server sitting on port 80) What I am doing is:

loading up RRAS
going to IPv4
Clicking NAT
Right-clicking the NIC that internet traffic flows through and clicking properties
Clicking the 'Services and ports' tab
Clicking Add, giving the service a description, on this interface, Protocol TCP, Incoming Port: 80, Private address: <ip of the internet facing NIC>, Outgoing Port 8080.

However when I do this I get an error saying 'The special port already exists.  Enter a unique special port.' I take this to mean that there is already a service using Port 80 which indeed there is but I cannot modify that one as the ports are greyed out and therefore inaccessible.  Is there a workaround for this error, or should I be attacking this from another angle?

Thanks in advance,
Question by:simonb1975

Expert Comment

ID: 22768201
You can't forward port 80 if you are running something on port 80 on the same box. As for other angles I need more info about the setup - is the port 80 app on this server accessible from the outside world? Do you have a router in front of the '08 box you could forward from? Is it acceptable to specify a port on the url string users are using?

Author Comment

ID: 22813567
Managed to get round it in the end after a little more reading on the capabilities of our firewall.  I essentiall found out that while Server 2008 could not do the redirection I found out that our Firebox X could redirect web requests on port 80 to an internal server listening on port 8080 and thus my problem was solved.  Thank you for your help.

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