debian/local/sshd_config.d/modern-ssh.conf


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

CASignatureAlgorithms ssh-ed25519,rsa-sha2-512,rsa-sha2-256
Ciphers chacha20-poly1305@openssh.com,aes256-gcm@openssh.com,aes128-gcm@openssh.com,aes256-ctr,aes192-ctr,aes128-ctr