Cloudflare 526: The Redirect Loop Behind One Setting

Flexible gives you an infinite redirect. Full strict gives you a 526. The documentation says Full or higher, and higher is the one that breaks.

Cloudflare Error 526 and the Redirect Loop: Two Failures, One Setting. Abstract error autopsy illustration in orange and dark grey on debugly.dev
Mode Cloudflare to origin What happens against an HTTPS-redirecting origin
Flexible plain HTTP Origin redirects to HTTPS, loop
Full HTTPS, certificate not validated Works
Full (strict) HTTPS, certificate validated against a public CA 526 if the origin certificate is internal

Published on debugly.dev by Rohit Bhadani | Founder of Krova Cloud