To change the default port , there are two parts to be followed :-

A) First Open port in windows Firewall

B) Change the port

1) Open Windows Exprloer, go to Control Panel\windows firewall, click Allow a programe through Windows Firewall.
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2) Click Add port..., choose TCP, input Name and Port Number, click OK


3) Click OK in Windows Firewall Settings window.

Finally changing the settings

1) Start Registry Editor.
On desktop select menu: Start > Run, input 'regedit' and click OK

2) Locate the registry subkey for RDP port:
In Registry Editor find HKEY_LOCAL_MACHINE\System\CurrentControlSet\Contro l\TerminalServer\WinStations\RDP-Tcp\PortNumber

3) On the Edit menu, click Modify, and then click Decimal.

4) Type the new port number, and then click OK.

5) Quit Registry Editor.

6) Restart the server