Command Line is a favourite for all those who like to play around
So here I will explain how to change RDP Port from Command Line , there are many reasons why you would like to do that. Its possible the Default 3389 port is not being forwarded by the firewall or there might be some different in your case. You will need to access the machine using Command Line if you are trying to achieve this remotely and if you have a shell access you can pretty much do so.
Microsoft Provides an automatic method and Manual Method on Microsoft Support Site but we dont want that


I will be explaining it on Metasploit but you can achieve the same even with a simple Command Shell.

First Find out the Current RDP Port by typing the Following in CMD


The above command will display RDP port in hexadecimal format. To convert from hexadecimal to decimal use the python interpreter or some other tools you like, for those in Kali can simply type .

Now find out the HEX value of the Port you want to change to by using . Here we want to use Port 139 after getting the Hex Value overwrite in the reg by typing in the following :


Now restart terminal services.
NOTE: Before restarting terminal services make sure that new rdp port is opened in firewall.



Enjoy

you can open Firewall Port by doing a Simple Netsh