What port should I open to allow remote desktop? - Server Fault

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3389 port forwarding Port forwarding simply maps the port on your router's IP address (your public IP) to the port and IP address of the PC you want to access. Specific steps for enabling port forwarding depend on the router you're using, so you need to search online for your router's instructions..

3389 port number You may need to forward ports in your router when you use Remote Desktop. A port forward allows incoming connection requests from the internet to go straight to Remote Desktop.

3389 game Creating a Port Forwarding Rule: For RDP to function correctly, both the external and internal ports should be set to 3389, directing incoming RDP requests to the designated internal IP address of the remote desktop.