1. 获取root权限

    su - root 输入密码

  2. 查看防火墙状态

    systemctl status firewalld

  3. 临时关闭防火墙

    systemctl stop firewalld

  4. 永久关闭防火墙

    systemctl disable firewalld

  5. 打开防火墙

    systemctl enable firewalld