Today I noticed a strange request that I had never noticed when my web app made an XHR request for my domain.
When I make a GET or POST request to my backend, e.g. https://example.com/index.php/status
Another POST request is made to https://example.com/cdn-cgi/rum?req_id=99999999, this request return code 200.
If I access the URL directly, this page displays the text “” 405 Not Allowed - cloudflare “”
What is that? What is the purpose of this request? Is it really made for Cloudfare?