Cloudflare is a CDN (content delivery network) with a security layer. Once Cloudflare service is established for a domain, its web traffic is routed through Cloudflare’s global network.
Cloudflare’s network also blocks threats and limits abusive bots before they hit the server, which means less wasted bandwidth and server resources.
The HTTP ports that Cloudflare supports are 80, 8080, 8880, 2052, 2082, 2086, and 2095.
The HTTPS ports that Cloudflare supports are 443, 2053, 2083, 2087, 2096, and 8443.