Ninjafirewall : Whitelist admin actions and keep original IP with CloudFlare

.htninja

<?php
/**
 * Ninjafirewall Custom Rules
 *
 * @package codetot-maintenance
 * @author codetot
 * @since 0.0.1
 **/

if ( !empty($_POST['_wpnonce']) && strpos($_SERVER['SCRIPT_NAME'], '/wp-admin/post.php') !== FALSE ) {
   return 'ALLOW';
}

if ( !empty($_POST['_wpnonce']) && strpos($_SERVER['SCRIPT_NAME'], '/wp-admin/admin-ajax.php') !== FALSE ) {
   return 'ALLOW';
}

if (! empty($_SERVER["HTTP_CF_CONNECTING_IP"]) &&
 filter_var($_SERVER["HTTP_CF_CONNECTING_IP"],FILTER_VALIDATE_IP)) {
   $_SERVER["REMOTE_ADDR"] = $_SERVER["HTTP_CF_CONNECTING_IP"];
}