Cloudflare

Useful Cloudflare tricks and configs.

Get real visitor IPs in nginx

This allows you to get the real visitor IPs in nginx instead of Cloudflare’s proxy IPs. Useful if you use Cloudflare’s proxy.

Edit /etc/nginx/nginx.conf and add the following inside http section:

# Show original visitor IP from Cloudflare proxy requests
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 104.16.0.0/13;
set_real_ip_from 104.24.0.0/14;
set_real_ip_from 108.162.192.0/18;
set_real_ip_from 131.0.72.0/22;
set_real_ip_from 141.101.64.0/18;
set_real_ip_from 162.158.0.0/15;
set_real_ip_from 172.64.0.0/13;
set_real_ip_from 173.245.48.0/20;
set_real_ip_from 188.114.96.0/20;
set_real_ip_from 190.93.240.0/20;
set_real_ip_from 197.234.240.0/22;
set_real_ip_from 198.41.128.0/17;
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;

Note: set_real_ip_from must be Cloudflare IPs. Check if IPs are diferent and edit config as needed.

Reload nginx config:

systemctl reload nginx.service

Get real visitor IPs in Apache2

This allows you to get the real visitor IPs in apache2 instead of Cloudflare’s proxy IPs. Useful if you use Cloudflare’s proxy. This also applies if you use apache2 behind some other reverse proxy like nginx.

First we need to enable remoteip module with:

a2enmod remoteip

Next create remoteip config telling what header and IP ranges to use. Create the file:

/etc/apache2/conf-available/remoteip.conf

With the following config:

RemoteIPHeader X-Forwarded-For
RemoteIPTrustedProxy 103.21.244.0/22
RemoteIPTrustedProxy 103.22.200.0/22
RemoteIPTrustedProxy 103.31.4.0/22
RemoteIPTrustedProxy 104.16.0.0/13
RemoteIPTrustedProxy 104.24.0.0/14
RemoteIPTrustedProxy 108.162.192.0/18
RemoteIPTrustedProxy 131.0.72.0/22
RemoteIPTrustedProxy 141.101.64.0/18
RemoteIPTrustedProxy 162.158.0.0/15
RemoteIPTrustedProxy 172.64.0.0/13
RemoteIPTrustedProxy 173.245.48.0/20
RemoteIPTrustedProxy 188.114.96.0/20
RemoteIPTrustedProxy 190.93.240.0/20
RemoteIPTrustedProxy 197.234.240.0/22
RemoteIPTrustedProxy 198.41.128.0/17
RemoteIPTrustedProxy 2400:cb00::/32
RemoteIPTrustedProxy 2606:4700::/32
RemoteIPTrustedProxy 2803:f800::/32
RemoteIPTrustedProxy 2405:b500::/32
RemoteIPTrustedProxy 2405:8100::/32
RemoteIPTrustedProxy 2a06:98c0::/29
RemoteIPTrustedProxy 2c0f:f248::/32

Note: RemoteIPTrustedProxy must be Cloudflare IPs. Check if IPs are diferent and edit config as needed.

Enable remoteip config and restart apache2:

a2enconf remoteip
systemctl restart apache2