iptables

apt-get install chkconfig
linux iptables关闭/开启(重启机器生效):
  开启: chkconfig iptables on  
  关闭: chkconfig iptables off 
linux iptables启用/禁用(立即生效,重启机器失效).
  启用: service iptables start  
  禁用: service iptables stop