CentOS 7打开关闭防火墙相关命令

1、查看centos 版本：cat /etc/redhat-release

2、启动服务：systemctl start firewalld.service

如果服务报错Failed to start firewalld.service: Unit is masked

执行systemctl unmask firewalld.service

再启动 systemctl start firewalld.service

3、关闭服务：systemctl stop firewalld.service

4、重启服务：systemctl restart firewalld.service

5、显示服务的状态：systemctl status firewalld.service

6、在开机时启用/关闭服务

systemctl enable firewalld.service

systemctl disable firewalld.service

7、查看已启动的服务列表

8、停止 firewalld

# systemctl stop firewalld