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Fix Nginx Upstream Connection Refused & Upstream Not Found - How to Speed Up Cloudflare Wildcard DNS-Windows 11 WiFi No Internet? Antivirus May Be Blocking It

Updated 2026-07-28 06:50:11office-tools
Fix Nginx Upstream Connection Refused & Upstream Not Found - How to Speed Up Cloudflare Wildcard DNS-Windows 11 WiFi No Internet? Antivirus May Be Blocking It
Before changing system settings, save your work and note the exact error text so you can compare results after each step.

Extra verification checklist

  • Restart the affected app after changing permissions or configuration files.
  • Test the same workflow in a clean browser profile or a temporary user account.
  • Compare the result on another network if the error may be connection related.

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