1)      防火墙设置

# 查看防火墙状态

systemctl status firewalld

# 查看开机是否启动防火墙服务

systemctl is-enabled firewalld

# 关闭防火墙

systemctl stop firewalld

systemctl disable firewalld

# 再次查看防火墙状态和开机防火墙是否启动

systemctl status firewalld

systemctl is-enabled firewalld