# ldd /usr/sbin/sshd | grep wrap

• Network Security with tcpwrappers (hosts.allow and hosts.deny)

# cat /etc/hosts.allow

ALL: 127.0.0.0/8
# sshd: 192.168.X.10
# sshd: 192.168.X.0/24 192.168.100+X.0/24

# cat /etc/hosts.deny

sshd:ALL

# tail -f /var/log/auth.log

# :> /etc/hosts.allow

# cat /etc/hosts.deny

ALL: 172.16.1.249