ssh cannot disable password

[flint quiver]

Hello, i have start with my first ubuntu (server 2022 lts) but i cannot disable password can you help me ?

[toxic vortex]

What have you done to try and what are you trying to disable, user-wise?

[flint quiver]

i have set PasswordAuthentication no
and ```PubkeyAuthentication yes

Expect .ssh/authorized_keys2 to be disregarded by default in future.

AuthorizedKeysFile .ssh/authorized_keys .ssh/authorized_keys2

after that i have restart the service for sshd and reboot the server, the authentification with key work but other can connect with password

I want to force every user to already have an ssh key in .ssh/authorized_keys for connect else block the connection

[tidal pier]

That's not how that works; "else block the connection". The most sshd can do is close the connection because of missing keys in this case, it's not a firewall, it cannot "block" per se.

Run both ends with very verbose switches, and see, otherwise provide it, in complete.

[toxic vortex]

Well, I think they're trying to disable keyboard-interactive/password authentication to ssh, and require keys.

[toxic vortex]

You need to also disable ChallengeResponseAuthentication as well, to no similarly or keyboard-interactive password prompts would still work.