Azure Virtual Network
An Azure networking service that is used to provision private networks and optionally to connect to on-premises datacenters.
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Failed to access Linux VM created in Azure
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Haza Hafiz Riski
0
Reputation points
Yesterday I created a Linux VM in Azure and I was able to access it via Putty with port 22. Today, I tried to access with Putty and PowerShell but failed after logging in with the error description as below:
I have tried disabling firewal on my device but still experiencing problems. I also did not make any changes on the Azure network side.
Here is the configuration of the network side in Azure
{count} votes
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KapilAnanth-MSFT 46,876 Reputation points Microsoft Employee2024-11-07T04:37:12.8733333+00:00 Welcome to the Microsoft Q&A Platform. Thank you for reaching out & I hope you are doing well.
I understand that you are unable to SSH to a Linux VM in Azure.
From the looks of it,
- This looks more like a OS related issue than Azure(platform) related
- When I do a TCP Ping/Telnet to your Public IP on Port 22, I am able to receive a response
- This means that Azure is not blocking the traffic at platform level
- I would suggest you post this query in forums related to your Linux distros to get SMEs inputs as well.
With that said,
- Are you using Public Key authentication or Passwords? or Both?
- I see you are using a ".pem" format, but shouldn't Putty be using a ".ppk" format?
- Can you confirm that you used .ppk key while trying to access via Putty?
- Can you run the same command with "-v" parameter for debugging?
- ssh -v -i "<PathToPrivateKey>" mt4adm@57.155.89.109
- If possible, can you try Resetting the password?
- Either by using Password or adding a new Public Key to the Linux VM
- Deploy a dummy testVM in the same subnet as the LinuxVM
- RDP/SSH to this testVM and then try to access the Linux VM from this testVM
- Does this work? Are you able to access the LinuxVM from the testVM in the same subnet?
Cheers,
Kapil
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Haza Hafiz Riski 0 Reputation points
2024-11-07T08:15:36.06+00:00 - Are you using Public Key authentication or Passwords? or Both? Both
- I see you are using a ".pem" format, but shouldn't Putty be using a ".ppk" format? First I used reset password for Putty access, then I used .pem for access via PowerShell
- Can you confirm that you used .ppk key while trying to access via Putty? No, I used reset password for access ssh via Putty
- Can you run the same command with "-v" parameter for debugging?
- ssh -v -i "<PathToPrivateKey>" mt4adm@57.155.89.109
- ssh -v -i "<PathToPrivateKey>" mt4adm@57.155.89.109
- If possible, can you try Resetting the password? Done, but I still have the same problem
-
- Either by using Password or adding a new Public Key to the Linux VM
- Deploy a dummy testVM in the same subnet as the LinuxVM
- RDP/SSH to this testVM and then try to access the Linux VM from this testVM
- Does this work? Are you able to access the LinuxVM from the testVM in the same subnet?
I have created a new VM with the same subnet
But I still had the same problem. I tried access via Public & Private IP.
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Haza Hafiz Riski 0 Reputation points
2024-11-07T09:12:19.7666667+00:00 - Are you using Public Key authentication or Passwords? or Both? Both
- I see you are using a ".pem" format, but shouldn't Putty be using a ".ppk" format? First I used reset password for Putty access, then I used .pem for access via PowerShell.
- Can you confirm that you used .ppk key while trying to access via Putty? Used reset password
- Can you run the same command with "-v" parameter for debugging?
- ssh -v -i "<PathToPrivateKey>" mt4adm@57.155.89.109
- ssh -v -i "<PathToPrivateKey>" mt4adm@57.155.89.109
- If possible, can you try Resetting the password? I already reset password but still get the problem
-
- Either by using Password or adding a new Public Key to the Linux VM
- Deploy a dummy testVM in the same subnet as the LinuxVM
- RDP/SSH to this testVM and then try to access the Linux VM from this testVM
- Does this work? Are you able to access the LinuxVM from the testVM in the same subnet?
I have created a new VM with the same subnet
But I'm still having the same problem. I tried access via Public & Private IP.
Thanks,
Haza
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KapilAnanth-MSFT 46,876 Reputation points Microsoft Employee
2024-11-07T10:04:01.2666667+00:00 Thanks @Haza Hafiz Riski , for the detailed explanation.
Looks like the OS is blocking any SSH Connections or the SSH configuration is corrupted.
As next steps, follow the steps in
- Troubleshoot SSH connections to an Azure Linux VM that fails
- Detailed SSH troubleshooting steps for issues connecting to a Linux VM
You can leverage Azure Serial Console for Linux to connect to the VM and run the commands mentioned in above guides.
Access the serial console and change the settings. Serial console can be used regardless of the SSH configuration of a VM as it does not require the VM to have network connectivity to work.
Let us know how this goes.
As simple pre troubleshooting steps, you can try
- Restarting the VM
- Redeploying the VM
- or Reset the SSH configuration
If they don't help, you have to follow the steps mentioned in above documents only
Cheers,
Kapil
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