Cloudflare
mod_remoteip
Cloudflare has deprecated 'mod_cloudflare', and now recommend using 'mod_remoteip'. Please see their article: https://developers.cloudflare.com/support/troubleshooting/restoring-visitor-ips/restoring-original-visitor-ips/#mod_remoteip
mod_cloudflare
Source: (https://support.cloudflare.com/hc/en-us/articles/200170916-Why-should-I-install-mod-cloudflare-)
"Cloudflare reports the IP address of the visitor in an HTTP header it appends: CF-Connecting-IP, so there is some information on the original visitor. However in some instances where you have other programs that depend on the incoming IP address of the original visitor, there will be issues. The good news is that there is a solution which is outlined below.
See the below diagram for a more detailed explanation:"