Windows 2000 Server, XP Pro and Windows Server 2003 all listen on TCP port 3389 for connections. There are times when you need to change this. Let's say you have only one static IP but you have three servers/workstations you need to connect to. What do you do? Simple, change the listening port on the server or workstation to listen on a different port.

Open the registry with regedit and browse to:

HKLM\SYSTEM\CurrentControlSet\Control\Terminal Server\WinStations\RDP-Tcp

Look for a subkey called PortNumber and change it from the default 3389 to the decimal value of the desired port. To connect on a different port you would enter a colon and the port number after the servername or IP in the RDP connection dialog box.