CloudFlare and Prestashop. Restoring original visitor IPs (Real IP)

Cloudflare adds headers X-Forwarded-For and CF-Connecting-IP with original visitor IP address. So, we need to change nginx config to see original visitor IPs in Prestashop store.

You need installed nginx with ngx_http_realip_module module.

Include the following parameters to the http {} section:

Create file cloudflare in /etc/nginx/ directory with following entry:

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 104.16.0.0/12;
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 2c0f:f248::/32;
set_real_ip_from 2a06:98c0::/29;
real_ip_header CF-Connecting-IP;

Open /etc/nginx/nginx.conf and add in http {} section include cloudflare.

Save file.

To Include the original visitor IP in your logs, add the variables $http_cf_connecting_ip and $http_x_forwarded_for in the log_format directive.

Check nginx configuration:

nginx -t

If no errors there - you can restart nginx to apply new configuration:

• for CentOS/RHEL:

  systemctl restart nginx

• for Ubuntu:

  service nginx restart

Check your site and take a look at the error log (/var/log/nginx/..)

Optional

If some Prestashop modules need to catch Real IP into $_SERVER['REMOTE_ADDR'] variable, you may need to add also fastcgi_param REMOTE_ADDR $http_x_real_ip; after fastcgi_pass line

Good luck!