New Tweak: Restore Cloudflare Client IP

[batonac]

NGINX needs the following config in order to restore the original visitor IP when the site is behind Cloudflare:

set_real_ip_from 173.245.48.0/20
set_real_ip_from 103.21.244.0/22
set_real_ip_from 103.22.200.0/22
set_real_ip_from 103.31.4.0/22
set_real_ip_from 141.101.64.0/18
set_real_ip_from 108.162.192.0/18
set_real_ip_from 190.93.240.0/20
set_real_ip_from 188.114.96.0/20
set_real_ip_from 197.234.240.0/22
set_real_ip_from 198.41.128.0/17
set_real_ip_from 162.158.0.0/15
set_real_ip_from 104.16.0.0/13
set_real_ip_from 104.24.0.0/14
set_real_ip_from 172.64.0.0/13
set_real_ip_from 131.0.72.0/22
set_real_ip_from 2400:cb00::/32
set_real_ip_from 2606:4700::/32
set_real_ip_from 2803:f800::/32
set_real_ip_from 2405:b500::/32
set_real_ip_from 2405:8100::/32
set_real_ip_from 2a06:98c0::/29
set_real_ip_from 2c0f:f248::/32
real_ip_header CF-Connecting-IP;

The IP addresses need to reflect the lists from https://www.cloudflare.com/ips-v4 and https://www.cloudflare.com/ips-v6. There's a nice, scripted mechanism for this available here.

It seems to me that a toggle switch under the Tweaks tab would be a great place to enable this per site. Perhaps this is too vendor-specific to warrant such precedent, but Cloudflare is fairly ubiquitous...

[batonac]

FWIW, with a Cloudflare tunnel connecting via a unix socket, this is reduced to the following:

set_real_ip_from unix:;
real_ip_header CF-Connecting-IP;

[Hans-101]

+1