Cloudflare Edge Errors

Web Server Returned an Unknown Error — the origin sent unexpected responses to the proxy

Web Server Is Down — Cloudflare cannot establish a TCP connection to the origin server

Connection Timed Out — the origin server took too long to complete the TCP handshake

Origin Is Unreachable — Cloudflare cannot locate a network path to the origin IP

A Timeout Occurred — the origin server connected but failed to reply in time

SSL Handshake Failed — Cloudflare could not negotiate a secure connection to the origin

Invalid SSL Certificate — the origin server presented an untrusted or invalid certificate

Origin DNS Error

Access Denied

DNS Resolution Error — Cloudflare cannot resolve the hostname provided in the request

Restricted — Cloudflare blocked the request because the URL resolves to a disallowed IP address

Origin DNS Error — Cloudflare cannot resolve the origin server hostname in the zone configuration

DNS Points to Prohibited IP

Rate Limited

Railgun Error — Cloudflare could not complete the Railgun connection to the origin