So, I followed this: https://support.cloudflare.com/hc/en-us/articles/200170756-How-do-I-restore-original-visitor-IP-with-IPB-Invision-Power-Board- but I still get visitors with the wrong IP in the forums... and I don't know how to fix that. 

You definitely have the slide bar in green ?

The only other thing i have had issues with for IP Forwarding is Varnish Cache on the server

 

Yeah I do:

 

 

What about Varnish Cache ?

9 hours ago, Cloud 9 said:

What about Varnish Cache ?

I turned it off for my domain so I'll see when the change comes into effect.

Nah there was no change @Cloud 9 . Is there a way I can add this:

 

if (isset($_SERVER["HTTP_X_REAL_IP"]))

  $_SERVER["REMOTE_ADDR"] = $_SERVER["HTTP_X_REAL_IP"];

Anywhere in IPB?

Did you turn off cloud flare and varnish and kill the caches - did you look at the site to see how it was loading in a dev window (ie to see if varnish etc was still active)

As far as i know there is no problem using cloudfalre and running varnish if the right things are in place

Is there a way to do this with IPS3?