Contoh Firewall iptables

Menghapus rule iptables
# iptables -t nat -F

Eneble IP Forwarding
# echo 1 > /proc/sys/net/ipv4/ip_forward

Enable IP Masquerade
# iptables -t nat -A POSTROUTING -s 192.168.5.0/24 -o eth1 -j MASQUERADE

iptables REDIRECT to localhost
# iptables -t nat -A PREROUTING -p tcp --dport 80 -i eth2 -j DNAT --to 192.168.5.1