Thank you for installing packages from https://deb.myguard.nl
You just installed openssh-server.
Please review the configs in /etc/ssh/sshd_config.d/
Release 8.8p1 disables RSA signatures using the SHA-1 hash
algorithm by default. This change has been made as the SHA-1
hash algorithm is cryptographically broken. For most users,
this change should be invisible and there is no need to
replace ssh-rsa keys.
If you need to connect with such a signature, you can add
“PubkeyAcceptedAlgorithms +ssh-rsa” to your config.
We recommend enabling RSA/SHA1 only as a stopgap measure until
legacy implementations can be upgraded or reconfigured with
another key type (such as ECDSA or Ed25519).
How to specifically overcome this issue?
Every time I update my Ubuntu server using your repo, not the ppa from ubuntu… I got this notice.
And I cannot login anymore.