# /etc/ssh/sshd_config.d/modern-ssh.conf

CASignatureAlgorithms ssh-ed25519
Ciphers chacha20-poly1305@openssh.com
HostbasedAcceptedKeyTypes sk-ssh-ed25519-cert-v01@openssh.com,sk-ssh-ed25519@openssh.com,ssh-ed25519-cert-v01@openssh.com,ssh-ed25519
HostKeyAlgorithms sk-ssh-ed25519-cert-v01@openssh.com,sk-ssh-ed25519@openssh.com,ssh-ed25519-cert-v01@openssh.com,ssh-ed25519