必应池
Home / developer-tools / Enable Wildcard Subdomain in Cloudflare: Step-by-Step - How to Fix nginx upstream connection refused on localhost-Fix Nginx 502 Bad Gateway: Upstream Connection Refused

Enable Wildcard Subdomain in Cloudflare: Step-by-Step - How to Fix nginx upstream connection refused on localhost-Fix Nginx 502 Bad Gateway: Upstream Connection Refused

2026-07-28 09:13:42developer-tools
Enable Wildcard Subdomain in Cloudflare: Step-by-Step - How to Fix nginx upstream connection refused on localhost-Fix Nginx 502 Bad Gateway: Upstream Connection Refused

Final checklist

  • Confirm that the same symptom is gone after a restart or refresh.
  • Keep the smallest working change and undo temporary diagnostic settings.

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