sshd_config

Port 22
AddressFamily inet
ListenAddress 0.0.0.0
HostKey /etc/ssh/ssh_host_ed25519_key
SyslogFacility AUTH
LogLevel VERBOSE
PermitRootLogin no
PubkeyAuthentication yes
AuthorizedKeysFile .ssh/authorized_keys
MaxAuthTries 6
PasswordAuthentication no
PermitEmptyPasswords no
ChallengeResponseAuthentication no
UsePAM yes
AllowAgentForwarding no
AllowTcpForwarding no
IgnoreRhosts yes
HostbasedAuthentication no
GatewayPorts no
PermitUserEnvironment no
X11Forwarding no
PrintMotd no
PrintLastLog yes
TCPKeepAlive yes
UseDNS no
PermitTunnel no
AcceptEnv LANG LC_*
Subsystem       sftp    /usr/lib/openssh/sftp-server -f AUTHPRIV -l INFO

Ciphers chacha20-poly1305@openssh.com,aes256-gcm@openssh.com,aes128-gcm@openssh.com
MACs hmac-sha2-256-etm@openssh.com,hmac-sha2-512-etm@openssh.com,umac-128-etm@openssh.com
KexAlgorithms curve25519-sha256@libssh.org
HostKeyAlgorithms ssh-ed25519-cert-v01@openssh.com,ssh-rsa-cert-v01@openssh.com,ssh-ed25519,rsa-sha2-512,rsa-sha2-256

AllowUsers john