How to change the Terminal Server or RDP listening port ?
By default, Terminal Server, and the Remote Desktop Protocol uses TCP port 3389. It is sometimes useful to change the port not to conflict with other machines on the network.
To change the default port, follow the simple steps below:
1. Navigate to Start > Run, type: regedit
2. Navigate to: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\ Control\Terminal Server\WinStations\RDP-Tcp
3. Locate the "PortNumber" subkey and change the value from 00000D3D (hex for 3389) to some other port between 1025 and 65535.
Note: You will also need to configure your RDP/TS client to connect to the same port by specifying the port number with the IP address, as x.x.x.x:nnnn (where x.x.x.x is your RDP IP, and nnnn is the port number).