Include /etc/ssh/sshd_config.d/*.conf

Port 29

LoginGraceTime 2m
PermitRootLogin no
StrictModes yes
MaxAuthTries 3
MaxSessions 4

AllowUsers sysadmin

PubkeyAuthentication yes

AuthorizedKeysFile .ssh/authorized_keys

PasswordAuthentication no
PermitEmptyPasswords no

ChallengeResponseAuthentication no

UsePAM yes

AllowAgentForwarding no
AllowTcpForwarding no
X11Forwarding no
PrintMotd no
PrintLastLog no
ClientAliveInterval 300
ClientAliveCountMax 1

AcceptEnv LANG LC_*

Subsystem    sftp    /usr/lib/openssh/sftp-server