iptables -A INPUT -p tcp -m state --state NEW -m tcp --dport 80 -j ACCEPT
iptables -A INPUT -p tcp -m state --state NEW -m tcp --dport 1812 -j ACCEPT
iptables -A INPUT -p tcp -m state --state NEW -m tcp --dport 1813 -j ACCEPT
service iptables save
service iptables restart