Linux防火墙 firewalld

1、基本使用 启动: systemctl start firewalld 查看状态: systemctl status firewalld 停止: systemctl disable firewalld 禁用: systemctl stop firewalld 2、Centos7操作 1、启动一个服务 systemctl start firewalld.service 2、关闭一个服务: systemctl stop firewalld.service 3、重启一个服务: systemctl restart firewalld.service 4、显示一个服