suddenly unable to connect to VM with 0x112f error code and the application hosted on it is not working

Question

I have a VM on azure running with windows operating system and I have dotnet angular application hosted on it. It has been working fine for almost a year.

However, yesterday I tried to connect to it using "Remote Desktop Connection" as usual, but I got the error shown in the screenshot and I am unable to connect to the VM. Also the application hosted on it is down.

on Azure the status of the machine is running and the resource health is available.

I didn't change any configuration or did anything that might have caused this

Answer 1

Hello Heba Farid

Welcome to Microsoft Q&A Platform, thanks for posting your query here.

Based on the error message you provided, it seems like there is an issue with the Remote Desktop Protocol (RDP) connection to your Azure VM. This error code (0x112f) usually indicates that there is a problem with the RDP client or server, or that there is a network connectivity issue and is typically caused by an issue with the SSL certificate used by the Remote Desktop Service.

Was there any updates made to the VM before this issue started?

To troubleshoot this issue, you can try the following steps:

• Make sure that the RDP settings on your VM are configured correctly. You can check the RDP settings by logging in to the Azure portal, navigating to your VM, and clicking on the "Connect" button. This will show you the RDP settings for your VM.
• Verify that the SSL certificate used by the Remote Desktop Service is still valid and has not expired or been revoked. You can do this by opening the Certificates snap-in in the Microsoft Management Console (MMC) and checking the certificate for the Remote Desktop Service.
• Make sure that your VM is accessible over the network.
• Sometimes, restarting the VM can resolve connectivity issues.
• Try to Stop and Start the VM to see if this resolves the issue.

Regarding the application hosted on the VM is down, it is possible that it is down because of the RDP connection issue. Once you are able to connect to the VM, you can check the status of the application and troubleshoot any issues that you find.

Hope this helps.

If you need further help on this, tag me in a comment.

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