1、查看firewalld状态

systemctl status firewalld

systemctl is-active firewalld

2、开启、重启、关闭firewalld服务

开启：

systemctl start firewalld

关闭

systemctl stop firewalld

重启

systemctl restart firewalld

3、设置、取消开机启动firewalld

设置开启启动firewalld

systemctl enable firewalld

取消开机启动firewalld

systemctl disable firewalld

查询是否开机启动firewalld

systemctl is-enabled firewalld

4、查询、开放、关闭firewalld端口

查询全部已开放的端口

firewall-cmd --list-all

查询某个端口是否开放

firewall-cmd --query-port=[端口]/tcp

开放端口

firewall-cmd --permanent --add-port=[端口]/tcp

关闭端口

firewall-cmd --permanent --remove-port=[端口]/tcp

刷新服务（开放、关闭端口操作后需要刷新才能生效）

firewall-cmd --reload