Changing the RDP Port
As mentioned earlier, RDS securely communicates over TCP port 3389 using RDP. Organizations requiring even greater security can change the default port by modifying the following Registry key:
HKEY_LOCAL_MACHINE\System\CurrentControlSet\Control\Terminal Server\WinStations\RDP-Tcp\PortNumber
Or, if RemoteApp programs are being used, the RDP settings can be modified to specify a different port for RDP traffic.
Note
Only clients using RDP version 5.1 or later can connect to the nonstandard port. Also, after the port is changed, the RD Session Host server or RD Virtualization Host server must be restarted.
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