Cloudflare Edge-Errors Error Codes

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