Are you using CloudFlare? Then you might have the issue that Apache registers the IP-address of the CloudFlare hosting platform instead of the IP-address of the visitor.
In that case you have to enable the mod_cloudflare Apache module. You can do this by running:
yum -y install libtool httpd-devel
cd /root/
git clone https://github.com/cloudflare/mod_cloudflare.git && cd mod_cloudflare
apxs -a -i -c mod_cloudflare.c
chmod 755 /usr/lib64/httpd/modules/mod_cloudflare.so
service httpd restart && httpd -M|grep cloudflare
Redirecting to /bin/systemctl restart httpd.service
cloudflare_module (shared)
