CentOS7 防火墙开放3306、8090、80、443端口

一、在 Centos 7 中防火墙由 firewalld 来管理,而不是 iptables。二、2.1、查看防火墙状态firewall-cmd --state-结果显示为running或not running2.2、关闭防火墙firewallsystemctl stop firewalld.serv
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