查看防火墙状态
systemctl status firewalld关闭防火墙，重启后失效
systemctl stop firewalld关闭防火墙，重启后仍保持关闭
systemctl disable firewalld开启防火墙
systemctl enable firewalld
查看防火墙状态
systemctl status firewalld关闭防火墙，重启后失效
systemctl stop firewalld关闭防火墙，重启后仍保持关闭
systemctl disable firewalld开启防火墙
systemctl enable firewalld