查看防火墙状态：
firewall-cmd --state
关闭防火墙
service firewalld start
开机启动
service firewalld stop
禁止开机启动
system disable firewalld.service
查看防火墙状态：
firewall-cmd --state
关闭防火墙
service firewalld start
开机启动
service firewalld stop
禁止开机启动
system disable firewalld.service