查看开启关闭centos 7的防火墙

irewall-cmd --state #查看防火墙

systemctl status firewalld #查看防火墙

systemctl stop firewalld #临时关闭防火墙

systemctl start firewalld #临时打开防火墙

systemctl disable firewalld #开机禁止启动防火墙

systemctl enable firewalld #开机启动防火墙