Home / office-tools / Fix Nginx 'upstream connection refused' When Talking to PHP-FPM - Cloudflare Wildcard SSL Not Working? Try These Fixes-How to Resolve Cloudflare 522 Error by Adjusting Timeouts

Fix Nginx 'upstream connection refused' When Talking to PHP-FPM - Cloudflare Wildcard SSL Not Working? Try These Fixes-How to Resolve Cloudflare 522 Error by Adjusting Timeouts

Updated 2026-07-28 08:47:19office-tools

Fix Nginx 'upstream connection refused' When Talking to PHP-FPM - Cloudflare Wildcard SSL Not Working? Try These Fixes-How to Resolve Cloudflare 522 Error by Adjusting Timeouts

Likely symptom

Likely cause

Safe rollback

Verification route

Repeat the original action, not only a simplified test case.
Restart the app or reload the service after configuration changes.