NO.4 Centos 8 关闭防火墙

查看防火墙状态：

systemctl status firewalld.service

停止防火墙服务

systemctl stop firewalld.service

systemctl disable firewalld.service 禁用防火墙自动启动

如果想开启防火墙的服务，则输入如下命令：

systemctl enable firewalld.service
systemctl start firewalld.service