How to use IP Address restriction on IIS?


I’m using IP Address restriction on IIS to allow only certain IP addresses to authenticate to some folder.
When I started to use the cloudfare, the “source” ip was changed so now i can’t ALLOW this ip.
How can i set it right ?



Thank you
I’ve seen this post before but wasn’t sure it was related.
This module has another purpose or just this one ?


That should be mostly for rewriting the addresses.