centos7安装httpd,外部主机无法访问解决方案

问题描述：

httpd是正常开启的，但是外部主机访问超时，本地确可以访问

防火墙问题

检查防火墙是否开启

[root@centos7 conf]# systemctl status firewalld.service
● firewalld.service - firewalld - dynamic firewall daemon
   Loaded: loaded (/usr/lib/systemd/system/firewalld.service; enabled; vendor preset: enabled)
   Active: active (running) since Fri 2020-06-12 00:42:05 CST; 17min ago
     Docs: man:firewalld(1)
 Main PID: 846 (firewalld)
    Tasks: 2
   CGroup: /system.slice/firewalld.service
           └─846 /usr/bin/python2 -Es /usr/sbin/firewalld --nofork --nopid

Jun 12 00:42:05 centos7 systemd[1]: Starting firewalld - dynamic firewall daemon...
Jun 12 00:42:05 centos7 systemd[1]: Started firewalld - dynamic firewall daemon.

关闭firewalld.service

[root@centos7 conf]# systemctl stop firewalld.service

访问成功

在Centos6中需要关闭的是iptables