Centos7-firewall

1、查看防火牆狀態

   systemctl status firewalld.service

2、啓動防火牆

   systemctl start firewalld.service

3、關閉防火牆

   systemctl stop firewalld.service

4、重新啓動防火牆

   systemctl restart firewalld.service

5、列出所有的開放端口

   firewall-cmd --list-all

6、添加開放端口

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

7、移除端口 
   firewall-cmd --permanent --zone=public --remove-port=80/tcp
 
8、配置生效重載 
   firewall-cmd --reload
9、查詢 
   firewall-cmd --zone=public --query-port=80/tcp