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SSH connection to slice nodes, failed

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  • February 10, 2026 at 6:36 pm #9497
    Meshal Alruwisan
    Participant

      Hello,

      I can not SSH or execute commands to all the nodes in slice: a336a5f3-266b-438f-8759-8a13f50fc8e

      Although, I can SSH to nodes from other slice. I tried manually connect to one of the nodes in this slice and I got this error:

      Warning: Permanently added ‘bastion.fabric-testbed.net’ (ED25519) to the list of known hosts.
      Warning: Permanently added ‘2610:e0:a04c:fab2:f816:3eff:fe97:33ab’ (ED25519) to the list of known hosts.
      ubuntu@2610:e0:a04c:fab2:f816:3eff:fe97:33ab: Permission denied (publickey).

      How can I fix this issue?

       

      Thank you in advance.

      February 11, 2026 at 10:27 am #9499
      Mert Cevik
      Moderator

        If I understand the problem from the description correctly (“manual connect”), you’re trying to connect to the VM(s) from a terminal on your computer/laptop and getting the error. If that’s the case, you need to set up your ssh client configuration file and ssh keys properly (in your computer/laptop) and connect. This page can be helpful -> https://learn.fabric-testbed.net/knowledge-base/logging-into-fabric-vms/

        If my understanding is wrong and problem is something different, please disregard the info above.

         

        February 11, 2026 at 10:33 am #9500
        Meshal Alruwisan
        Participant

          Yes, I meant SSH using terminal. I am able to connect to other VMs using the same PC. I only have issue with this slice. Since I am able to connect to other VMs I do not think I have issues with keys/configurations. Is there another solution I could try?

          Thank you,

          February 11, 2026 at 11:10 am #9501
          Mert Cevik
          Moderator

            So, since you’re able to login to this problematic VM from other sources, then you can check and make sure the right SSH key is inside the VM. I just placed my SSH key in it, and I could login properly. Please let us know about the status following your SSH key check and I will take a look further.

            February 11, 2026 at 1:08 pm #9502
            Meshal Alruwisan
            Participant

              Thank you, I was able to ssh using slice>connect to VM ” with generating new key” and I added the public key myself. For all the VMs except “Spine12” I got the error below. Management IP Address: 2610:e0:a04c:fab2:f816:3eff:fe41:d076

               

              Error reading SSH protocol banner

               

              How can I solve this issue?

               

              Thank you.

              February 11, 2026 at 3:39 pm #9508
              Meshal Alruwisan
              Participant

                Not sure what happened, but I am able now to connect to all the VMs and it is fixed.

                Thank you Mert for the help.

                Best regards,

                Meshal

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