一、unmask
systemctl unmask firewalld.service
二侵续、開放端口
firewall-cmd --zone=public --add-port=80/tcp --permanent
三闯参、開啟防火墻
systemctl start firewalld
systemctl unmask firewalld.service
firewall-cmd --zone=public --add-port=80/tcp --permanent
systemctl start firewalld