永久关闭(重启后生效)
开启: chkconfig iptables on
关闭: chkconfig iptables off
临时关闭(重启后失效)
开启: service iptables start
关闭: service iptables stop
开启: chkconfig iptables on
关闭: chkconfig iptables off
开启: service iptables start
关闭: service iptables stop