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I have edited the sshd_config file of my instance (Google Cloud Platform) to change port 22 to a new port. Add a new firewall rule for the port, but now I can't connect neither to 22 or to the port that I have configured. Nor can I access through the serial port. Anyone know any alternative to access the instance, or any option to not lose all my settings (databases, etc)

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Create an ingress VPC firewall rule to allow the different ssh port.

Snapshot the broken instance's disk. Start a backup from this snapshot, just in case. Create a new disk from this snapshot and attach it as an additional disk to a working VM.

On the temporary instance, mount the copy of the broken disk. Edit sshd_config and any host firewalls. Test the sshd_config by starting another daemon with sshd -f.

Restore the fixed disk to an instance.

  • Thanks a lot... Do you have any tutorial for these ? – Juan Huerta Jul 30 at 12:43

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