How to remove all iptables rules

Create a file /root/fw.stop with the following content:

#!/bin/sh
echo "Stopping firewall and allowing everyone..."
iptables -F
iptables -X
iptables -t nat -F
iptables -t nat -X
iptables -t mangle -F
iptables -t mangle -X
iptables -P INPUT ACCEPT
iptables -P FORWARD ACCEPT
iptables -P OUTPUT ACCEPT

Make it executable and then run it on the terminal.

Source: http://www.cyberciti.biz/tips/linux-iptables-how-to-flush-all-rules.html