# 防火墻 [TOC] ## centos6.8 > 注：以下是防火墻的基本操作命令，可能但不一定適用于所有centos系統 - 查詢防火墻狀態 ``` service iptables status ``` - 停止防火墻 ``` service iptables stop ``` - 啟動防火墻 ``` service iptables start ``` - 重啟防火墻: ``` service iptables restart ``` - 永久關閉防火墻: ``` chkconfig iptables off ``` - 永久關閉后啟用: ``` chkconfig iptables on ``` ## centos7 - 永久關閉防火墻 ``` sudo systemctl disable firewalld ``` - 查看防火墻狀態 ``` sudo systemctl status firewalld ``` - 打開防火墻 ``` sudo systemctl start firewalld ``` - 關閉防火墻 ``` sudo systemctl stop firewalld ```