介绍关于centos7防火墙的，添加、查看、删除、重启等命令

重启 systemctl restart firewalld

查看 firewall-cmd --zone=public --list-ports

指定 firewall-cmd --zone=public --query-port=80/tcp

删除 firewall-cmd --zone= public --remove-port=80/tcp --permanent

添加 firewall-cmd --zone=public --add-port=80/tcp --permanent

重载 firewall-cmd --reload

启动 systemctl start firewalld

状态 systemctl status firewalld

停止 systemctl disable firewalld

禁用 systemctl stop firewalld

开机 systemctl enable firewalld