if the user get’s this error message:

(recommended to run this one-liner on server AND client while debugging ssh connection problems)

lsb_release -d; # tested on (server and client)
Description: Debian GNU/Linux 11 (bullseye)

less /var/log/auth.log

May 23 14:37:03 SshServer sshd[2233]: Connection closed by authenticating user username 192.168.0.69 port 47382 [preauth]
May 23 14:37:15 SshServer sshd[2236]: Connection closed by authenticating user username 192.168.0.69 port 47384 [preauth]
May 23 14:38:06 SshServer sshd[2244]: Connection closed by authenticating user username 192.168.0.69 port 47386 [preauth]
May 23 14:38:15 SshServer sshd[2247]: Connection closed by authenticating user username 192.168.0.69 port 47388 [preauth]

...

why? why? why?:

it’s not enough to set in on SshServer:

vim /etc/ssh/sshd_config
PasswordAuthentication yes

also had to set:

PubkeyAuthentication no

and restart ssh service:

service ssh restart

 

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