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What port(s) should I open/NAT to allow me to use Remote Desktop?

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4 Answers

up vote 22 down vote accepted

Remote Desktop requires TCP port 3389 to be open.

It is possible to change the port used by the terminal server (or PC which is accessed), see this Microsoft support article: "How to change the listening port for Remote Desktop"

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4  
You can also have a different port if you use port forwarding. The private port is 3389 as said above unless you change it, and the public port can be whatever. I have mine set to 10000, so when I connect using Remote Desktop Connection, I have to enter mycomputer.com:10000 – Joseph May 25 '09 at 18:47
up vote 4 down vote

The only exception to the previous answer (3389) is when using Small Business Server through Remote Web Workplace.

In this case the server NAT's the connection between you and server port 80 (HTTP) or 443 (HTTPS), and then to the internal computer; so only 80/443 is required.

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up vote 0 down vote

If you don't want to use 3389 externally, open a different port externally, but point it to 3389 on the IP address of the machine you want RDC on. This is helpful for routing many systems with RDC. It's also nice because it won't require any registry edits.

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