On 11/03/2025 19:25, David Cooper wrote:
Marco (and anyone else with ssh access): You may need an updated ssh keypair which is stronger or more modern - whatever is needed by default by current latest debian bookworm.
If your logins are still not working apparently because of invalid key type, please send me a new public key which uses a current encryption method such as e.g. ed25519 and I will add to your .ssh/authorized_keys.
Dave Cooper
It's actually a bit more strict than default debian bookworm; I applied the server config recommendations from https://github.com/jtesta/ssh-audit, see /etc/ssh/sshd_config.d/local.conf This means you can't use ECDSA keys (RSA, ED25519 or ED25519-SK are all OK) and must use sufficiently modern ciphers, MAC and key-exchange algorithms. Georgiy