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Fix Cloudflare Wildcard Subdomain Redirect Loop - Quick Fixes for Chrome ERR_CONNECTION_RESET After Update-Nginx 502 Bad Gateway: Upstream Connection Refused Fix

2026-07-29 03:37:36office-tools
Fix Cloudflare Wildcard Subdomain Redirect Loop - Quick Fixes for Chrome ERR_CONNECTION_RESET After Update-Nginx 502 Bad Gateway: Upstream Connection Refused Fix

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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