centos7如何查看防火墙是否开启

一、防火墙的开启、关闭、禁用命令

推荐教程:centos使用教程

(1)设置开机启用防火墙:systemctl enable firewalld.service

(2)设置开机禁用防火墙:systemctl disable firewalld.service

(3)启动防火墙:systemctl start firewalld

(4)关闭防火墙:systemctl stop firewalld

(5)检查防火墙状态:systemctl status firewalld

二、使用firewall-cmd配置端口

(1)查看防火墙状态:firewall-cmd –state

(2)重新加载配置:firewall-cmd –reload

(3)查看开放的端口:firewall-cmd –list-ports

(4)开启防火墙端口:firewall-cmd –zone=public –add-port=9200/tcp –permanent

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