1.查看防火墙状态

systemctl status firewalld

2.查看防火墙是否开机启动

systemctl is-enabled firewalld

3.关闭防火墙

systemctl stop firewalld

systemctl status firewalld

4.禁用防火墙（系统启动时不启动防火墙服务）

systemctl disable firewalld

systemctl is-enabled firewalld

linux 查看防火墙状态