How can I allow http access on Centos 7?
By default, the Centos 7 template includes a fully locked down firewall.
To test, you can disable the firewall using
systemctl stop firewalld
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