I set up the SSH Server add-on and tried to get SSH running from MobaXTerm with public/private key authentication. I pasted the key from Putty Key Generator into the config box under the SSH Server configuration page. I loaded the public key file into the MobaXTerm session. But MobaXTerm SSH kept saying the login was refused and I kept getting this error in the SSH Server log:
Disconnected from authenticating user root 172.30.32.1 port 41632 [preauth]
Received disconnect from 172.30.32.1 port 41636:14: No supported authentication methods available [preauth]
I tried all kinds of things I found on the web.
- I found out that the private key file had Windows EOL characters and I converted them to Unix.
- I tried different formats of the public key string I pasted into Home Assistant SSH Server configuration page. Ultimately I returned to just copying it from the Putty Keygen and pasting it in (with enclosing quotes).
- I tried different formats of the private key file (like deleting the public key info from it) – just a WAG and it had no effect.
Finally, I found a post on the Ubuntu community about sshd problems. The following fixed it in HA.
Went into the Terminal Window on Home Assistant.
cd /etc/ssh
vi sshd_config
(added the following lines:)
PubkeyAuthentication yes
RSAAuthentication yes
One (or both) of those are what did it.
FYI.