Hello,

i want to use ssh public key over wireguard vpn to do an automatic backup of my nextcloud instance running on  an debian 11 x86 pc.

 

I recently updated my neo 3 to bullseye (device is client). 

Copied my public key with ssh-copy-id command but get propted an password authentication when try to login.

Tried the buster image, but same problem

 

sshd config is the delivered one with the image.

 

 

Is there anything special with armbian? With my pi 4 and raspberry os (1. backup device) everything is working.

 

check your sshd_config if PubkeyAuthentication is enabled.

PubkeyAuthentication yes and
AuthorizedKeysFile  .ssh/authorized_keys

 

are both enabled. 

 

Edit: Log:

 

Oct 31 23:21:54 nanopineo3 sshd[14043]: debug2: userauth_pubkey: authenticated 0 pkalg rsa-sha2-512 [preauth]
Oct 31 23:21:54 nanopineo3 sshd[14043]: debug3: user_specific_delay: user specific delay 0.000ms [preauth]
Oct 31 23:21:54 nanopineo3 sshd[14043]: debug3: ensure_minimum_time_since: elapsed 5.875ms, delaying 4.758ms (requested 5.316ms) [preauth]
Oct 31 23:21:54 nanopineo3 sshd[14043]: debug3: userauth_finish: failure partial=0 next methods="publickey,password" [preauth]
Oct 31 23:21:54 nanopineo3 sshd[14043]: debug3: send packet: type 51 [preauth]

 

 

Finaly got it. Problem was the RSA key. Generated a new one with 

ssh-keygen -o -a 256 -t ed25519 -C "$(hostname)-$(date +'%d-%m-%Y')"

and copied it.