Is this iptables script correct??????
Can anyone tell me how this iptable script looks? Is it correct? Is it efficient? Is there anything in there that does not look right or should not be there? Is there anything i should add?
I am trying to setup a firewall/Ip Masq. for an internal network. The firewall needs to accept ports 1444 & 1433 form 222.222.222.20 thanks in advance' #!/bin/sh echo 0 > /proc/sys/net/ipv4/ip_forward LAN_IP_NET='192.168.1.1/24' LAN_NIC='eth1' WAN_IP='222.22.222.22' WAN_NIC='eth0' iptables -t nat -F POSTROUTING iptables -t nat -F PREROUTING iptables -t nat -F OUTPUT iptables -F iptables -P INPUT ACCEPT iptables -P FORWARD ACCEPT # Start additional Rules iptables -A INPUT -p tcp --source-port 1433 -s 222.222.222.20 -j ACCEPT iptables -A INPUT -p tcp --source-port 1444 -s 222.222.222.20 -j ACCEPT # End additional rules iptables -P INPUT DROP iptables -P FORWARD DROP iptables -P OUTPUT ACCEPT iptables -t nat -A POSTROUTING -s $LAN_IP_NET -j MASQUERADE iptables -A FORWARD -j ACCEPT -i $LAN_NIC -s $LAN_IP_NET iptables -A FORWARD -m state --state ESTABLISHED,RELATED -j ACCEPT iptables -A INPUT -m state --state ESTABLISHED,RELATED -j ACCEPT echo 1 > /proc/sys/net/ipv4/ip_forward |
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