[HOW TO] Whitelist IPTABLE FIREWALL

[HOW TO] Whitelist IPTABLE  FIREWALL

#DROP ALL INPUT OUTPUT FORWARD

root@pornmongkon:~#iptables -P INPUT DROP
root@pornmongkon:~#iptables -P OUTPUT DROP
root@pornmongkon:~#iptables -P FORWARD DROP

#OPEN M STATE

root@pornmongkon:~#iptables -A INPUT -m state --state ESTABLISHED,RELATED -j ACCEPT
root@pornmongkon:~#iptables -A OUTPUT -m state --state NEW,ESTABLISHED,RELATED -j ACCEPT

#ADD Whitelist IP

root@pornmongkon:~#iptables -A INPUT -i eth0 -s IP -d IP -p tcp --dport PORT -j ACCEPT