Cloudflare is a gasket between the user and the site. It works on the principle of reverse proxy, providing additional services, including page caching, protection against DDoS, protection against bad bots, and more. Including, Cloudflare hides the true IP address of the server that hosts the site.

Cloudflare uses its name servers that respond to DNS queries and translate the hostname into an IP address. Those. the site owner configures the use of Cloudflare NS servers for his domain, these NS servers in response to DNS requests are sent by IP belonging to the Cloudflare network. As a result, the request to the site goes to Cloudflare, which receives the page from the server where the site is located (or from its cache) and shows this page to the user who requested it. As a result, the true IP address of the site behind Cloudflare becomes well hidden.