1. BSD images cause error- channel 0: open failed: connect failed: No route to host
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BSD images cause error- channel 0: open failed: connect failed: No route to host

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  • September 5, 2025 at 5:45 pm #8896
    Nishanth Shyamkumar
    Participant

      I tried to create a simple l2 topology using FreeBSD 14. I got the slice active after 30 minutes.

      However, I was unable to ssh into the VM getting the following error:

      Warning: Permanently added ‘bastion.fabric-testbed.net’ (ED25519) to the list of known hosts.
      channel 0: open failed: connect failed: No route to host
      stdio forwarding failed
      kex_exchange_identification: Connection closed by remote host
      Connection closed by UNKNOWN port 65535

      I tried using OpenBSD 7 and it failed with the same error.

      However using Ubuntu 20 gave me the slice in 4 minutes and I was able to SSH into the VM.

      Is there a problem specific to BSD operating system?

       

      September 5, 2025 at 6:13 pm #8897
      yoursunny
      Participant

        I haven’t used BSD in a decade, but I recall some BSD systems do not have IPv6 enabled by default or their SSH server isn’t listening on IPv6.

        You can confirm this hypothesis by trying to create the nodes on a site that has IPv4 management addresses.

        September 6, 2025 at 7:43 pm #8898
        Komal Thareja
        Participant

          Thank you for sharing this, Nishant and YoursSunny.

          I was able to reproduce the issue. On IPv4 sites, user SSH keys are not being injected, and on IPv6, SSH connections are failing completely. We’ll work on addressing this and will let you know once the fix has been deployed. Apologies for the inconvenience in the meantime.

          Best,

          Komal

          September 10, 2025 at 8:20 am #8914
          Komal Thareja
          Participant

            Hi,

            Fix for this issue has been deployed on production. Please try creating a slice and let us know if you run into any issues.

            Best,

            Komal

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