how to stop iptable?

how to stop iptable?

how to stop iptables?
how to config iptables for anybody allow?
      
use  firewall script below,

#!/bin/sh
iptables -F
iptables -X
iptables -F -t nat
iptables -P INPUT ACCEPT
iptables -P FORWARD ACCEPT
iptables -P OUTPUT ACCEPT
iptables -t nat -P PREROUTING ACCEPT
iptables -t nat -P POSTROUTING ACCEPT
iptables -t nat -A POSTROUTING -s LOCALIP -o eth0  -j MASQUERADE
echo "Firewall stopped!"                                                      

运行这个脚本规则,网络通畅。
而且有地址伪装,可以访问外网。      
service iptables stop