Failed to access Linux VM created in Azure

Question

Failed to access Linux VM created in Azure

Haza Hafiz Riski 45

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:

User's image

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 User's image

Haza Hafiz Riski 45 Reputation points

2024-11-07T09:12:19.7666667+00:00
Hi @KapilAnanth-MSFT

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

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

1 answer

Your answer

Haza Hafiz Riski 45 Reputation points

2024-11-07T09:12:19.7666667+00:00

Hi @KapilAnanth-MSFT

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

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

Answer 1

KapilAnanth-MSFT 49,536 Microsoft Employee Moderator

@Haza Hafiz Riski ,

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

Haza Hafiz Riski 45 Reputation points

2024-11-07T08:15:36.06+00:00
Hi @KapilAnanth-MSFT

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

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.
KapilAnanth-MSFT 49,536 Reputation points Microsoft Employee Moderator

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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Failed to access Linux VM created in Azure

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