How to Fix Nginx 'Upstream Connection Refused' Error - Resolve RDP Connection Failed in Windows-Fix Docker Pull Access Denied in CI/CD Pipeline

Updated 2026-07-28 11:38:35office-tools
How to Fix Nginx 'Upstream Connection Refused' Error - Resolve RDP Connection Failed in Windows-Fix Docker Pull Access Denied in CI/CD Pipeline
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.