Error after changing ssh port number, Server refused public-key signature despite accepting key

Question

I added the SSH new port number to the sshd_config file:

Port 50000

After that, I restarted the service with

systemctl restart sshd

When I try to connect with the port number I added, I need to connect with the key, but I get this error:

Server refused public-key signature despite accepting key

... and it asks for the password.

I also have to try to connect as something other than root.

The things I've tried are

• Updating putty and pageant.

• Changing the permissions on in the ~/.ssh directory and authorized_key file to 700/600.

How do I fix this?

Answer 1

You may need to regenerate your public/private key pair and update the config on server and client. As the port is actually the part of the URI, the change of port number is probably be the reason why the signature gets rejected. Make sure to remove the previous key pair in the process.