Скорее всего не в конфиге дело, но не долго и сравнить
root@(none):/home/mgmt $ cat /etc/sshd_config | grep -v ^$ | grep -v ^#
Port 31337
Protocol 2
HostKey /etc/ssh/ssh_host_key
HostKey /etc/ssh/ssh_host_rsa_key
HostKey /etc/ssh/ssh_host_dsa_key
HostKey /etc/ssh/ssh_host_ecdsa_key
PermitRootLogin without-password
PubkeyAuthenticatio
n yes
AuthorizedKeysFile .ssh/authorized_keys
AllowAgentForwardin
g no
AllowTcpForwarding no
GatewayPorts no
X11Forwarding no
UsePrivilegeSeparat
ion sandbox # Default for new installations.
PermitTunnel no
Banner /etc/ssh/banner
Subsystem sftp /usr/libexec/sftp-server