CentOS 7.0默认使用的是firewall作为防火墙
查看防火墙状态
firewall-cmd --state
停止firewall
systemctl stop firewalld.service
禁止firewall开机启动
systemctl disable firewalld.service
Centos7 关闭防火墙
原文:https://www.cnblogs.com/houss/p/11296342.html