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I want to change the default Port of 3389 used for RDP to my Server (Windows Web Server 2008 R2) to another Port.

I have Kaspersky anti-virus (no firewall) and Windows Firewall with Advanced Security running.

The trick - or the main thrust of my question - is I simply cannot lose the access to this Server. (ie I cannot make a mistake, as I do not have physical access to the machine to be able to fix any errors I make. Remote access only. If I break this - it could cost hundreds of $$ for someone else to physically revert the changes for me - on the other side of the world.)

Is there a way I can test my changes - while remotely accessing the machine - before 'switching' over to the new Port number?

I understand I need to change the Port number in:

  • Windows Firewall
  • Registry for RDP

I also understand I can use

netstat -a

to see which Ports are being listened to.

So I guess I am after a contingency plan plus the correct order of execution of certain steps to reduce my chance of making a mistake.

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    I would install vnc with a really strong password as a backup, make sure I can access and then make the changes.
    – DrNoone
    Oct 24, 2016 at 17:53
  • Thanks, thats a super idea - as a backup method :) Does that need a specific Port too? Or does it use 80? (Not that it matters, its still a super idea, I will investigate)
    – Grantly
    Oct 24, 2016 at 20:13
  • I think that the default port is 9100
    – DrNoone
    Oct 24, 2016 at 20:37

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