One of the common steps taken to secure a WordPress installation is to restrict access to wp-login.php using .htaccess rules. This restricts who can login to the website by specifying which networks can and blocking everything else.
For example, this would restrict access to wp-login.php for all networks except for 18.104.22.168 and 22.214.171.124
order deny, allow deny from all allow from 126.96.36.199 allow from 188.8.131.52
But this won’t work when the website is connected through CloudFlare – as all requests will be coming through the CloudFlare network.
Instead, you can use the following
SetEnvIf X-FORWARDED-FOR 184.108.40.206 allow SetEnvIf X-FORWARDED-FOR 220.127.116.11 allow order deny,allow deny from all allow from env=allow