How to Change the RDP Listening Port on Windows
Start the registry editor. (Type regedit in the Search box.) Navigate to the following registry subkey: HKEY_LOCAL_MACHINE\System\CurrentControlSet\Control\Terminal Server\WinStations\RDP-Tcp\PortNumber Click Edit > Modify, and then click Decimal. Type the new port number, and then click OK. Close the registry editor, and restart your computer. Don’t forget to open the new port on your firewall.