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Using Windows Server 2008 R2, I have configured a simple remote desktop access and IIS, then I used my external IP address to ensure that the default IIS web page is reached.

I connected localy to the server using Remote desktop and succeeded. Then, I tried RDP with the same external address used to connect to the IIS and failed. FYI, I am using dynamic-dns.

I have also tried using the domain name: since is both the name of my machine and also the name of my web site, and resolves normaly the IP address.

I have tried to find in Remote desktop Session host configuration in Administrative tools, if is there a way to configure dynamic IP but failed, hard to find on google too.

Is there an idea on this please ?

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up vote 3 down vote accepted

It sounds like you need to port forward TCP port 3389 to the server in the router/firewall.

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I already configured the router -> firewall -> Virtual Servers -> fixed local IP address of the server -> to allow the RDP on its port number. You remember the port number changing question ? – Sami-L Nov 6 '12 at 18:16
Have you verified that the server is listening on that port for RDS? – joeqwerty Nov 6 '12 at 18:20
Yes of course, do you remember Firewall predefined rule question, when it was question to change port number and create a new rule with the new number. – Sami-L Nov 6 '12 at 18:22
Yes, but that only addresses the firewall. RDS has to be configured to listen on the port. Have you done that? When you connect internally what port are you connecting to? – joeqwerty Nov 6 '12 at 18:27
I have changed the port number in the registry, and I use the same port to connect localy, it works. – Sami-L Nov 6 '12 at 18:29

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