Unable to connect to Azure VM after changing RDP Port to 443

Question

I have set up an Azure virtual machine running Windows 10 Client. As per the below post I changed the RDP Port to 443 but didn't add the VM Firewall Rule and restarted the VM. New Azure portal (no End Points) how to connect to VM with RDP from behind a firewall Now I am unable to connect to my Azure VM. I tried the following things 1) Unable to connect to remote Powershell since WinRM is disabled. I tried enabling it but somehow not working 2) Read about attaching this VM hard disk to second VM and loading the registry in second VM. But not sure how to do it.

Any suggestions.

I customized this VM as my development box and cannot loose this box and also looking this as learning exercise to fix this :) — masthi, Sep 23 '17 at 13:37
@masthi You could use Custom script extension to open port even you could not rdp to your VM. — Shui shengbao, Sep 25 '17 at 01:42
@masthi I am sure Custom Script extension will work on your scenario, you could test. — Shui shengbao, Sep 25 '17 at 10:02

score 2 · Accepted Answer · edited Jun 20 '20 at 09:12

2

You could use Azure Custom Script Extension to open port on Windows Firewall. Please refer to the following steps:

1.Start your VM.

2.Write a script to open port on Windows firewall. Like below:

netsh advfirewall firewall add rule name="Open Port 443" dir=in action=allow protocol=TCP localport=443

3.Execute this script by Custom Script Extension, you could do it on Azure Portal. Your VM-->Extensions-->+--> Custom Script Extension

Note: You also need open port 443 on Azure NSG. When you select Service, select Custom not https.

edited Jun 20 '20 at 09:12

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answered Sep 25 '17 at 01:41

Shui shengbao

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Thanks Walter. That worked like a charm. I have been trying to install this extension through PowerShell Command but didnt worked. Instead of running your command I ran the following command to change the port back to 3389 and rebooted the VM and it worked. – masthi Sep 25 '17 at 10:14
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Forgot to add the command Set-ItemProperty -Path "HKLM:\SYSTEM\CurrentControlSet\Control\Terminal Server\WinStations\RDP-TCP\" -Name PortNumber -Value 3389 – masthi Sep 25 '17 at 10:15

Haseeb · Answer 2 · 2022-01-03T14:51:54.313

you may restore default port using "RUN COMMAND" option

follow the below steps:

choose desired VM machine
Click on "Run Command" from the left menu panel
Choose "SetRDPPort" from the Command "Name" List
Enter "Port Number" that you want to or 3389 for default
Click on "Run" button
It will take 2 minutes to finish and your RDP port will be changed and added to the VM firewall as well.
Restart VM Machine
Now you can access your machine via RDP

Furthermore, refer picture below for better understanding,

Unable to connect to Azure VM after changing RDP Port to 443

2 Answers2