Fix: Cloudflare 5xx Error
Confirm origin is reachable from a non-CF IP
Cloudflare 5xx codes each point to a specific origin problem — 521 means origin down, 522 means origin timed out, 520 means an unknown origin response.
Frequently Asked Questions
What causes Cloudflare 5xx Error?
Cloudflare 5xx codes each point to a specific origin problem — 521 means origin down, 522 means origin timed out, 520 means an unknown origin response.
How to fix Cloudflare 5xx Error?
522 = origin timeout. Check origin health, firewall rules blocking Cloudflare IPs, and keepalive settings. Rule out origin before tuning Cloudflare timeouts.
Example fix from Kintify Fix
Input: Users seeing Cloudflare Error 522 intermittently
Output: 522 = origin timeout. Check origin health, firewall rules blocking Cloudflare IPs, and keepalive settings. Rule out origin before tuning Cloudflare timeouts.
Used by developers debugging real production systems