systemctl status firewalld
绿的running表示防火墙开启
systemctl stop firewalld
黑的 dead 表示防火墙关闭
systemctl start firewalld 4:开机禁用防火墙自启
systemctl start firewalld
systemctl disable firewalld 5:防火墙随系统开启启动
systemctl disable firewalld
systemctl enable firewalld