centos7 关闭防火墙
临时关闭，重启后失效
systemctl stop firewalld永久关闭
systemctl disable firewalld查看防火墙状态
systemctl status firewalld- 上一篇：php去掉字符串首尾的空格
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临时关闭，重启后失效
systemctl stop firewalld永久关闭
systemctl disable firewalld查看防火墙状态
systemctl status firewalld