How can I allow http access on Centos 7?
By default, the Centos 7 template includes a fully locked down firewall. To open the firewall for http and https issue the following commands as root, using console or SSH
Allow apache in firewall.
firewall-cmd --permanent --zone=public --add-service=http firewall-cmd --permanent --zone=public --add-service=https firewall-cmd --reload