Fix Nginx Upstream Connection Refused in Proxy Pass
When Nginx returns a 502 Bad Gateway or logs upstream connection refused
Software troubleshooting desk
Practical fixes for tool errors, setup blocks, and workflow issues.
Symptom
Cause
Fix route
Verify
Fresh repair notes
All notesFix Windows 11 Update Stuck at 0% with Clean Boot
You start a Windows Update, but it sits at 0% for minutes or hours. This can happen after a faile...
Fix Windows Update Error 0x80070002 on Windows 10
When Windows Update fails with error 0x80070002, it usually means the system can't find the u...
Fix Windows Update Error 0x80070005: Permission Issues
When you see Windows Update error 0x80070005, it usually means the update process lacks proper pe...
Fix Remote Desktop Connection Blocked by Firewall
When you try to connect to a remote PC using Remote Desktop (RDP) and get an error like “Remote D...
Fixing node-sass Build Failures on macOS
You run npm install and hit a wall: node-sass fails to compile native modules on mac...
Issue queue
SitemapFix 'python' Command Not Found on Windows 10 with Python 3.10
Fix Windows Security App Not Responding: Step-by-Step
Fix Chrome Black Screen on Nvidia GPU with Hardware Acceleration
Fix VSCode IntelliSense Not Working for PowerShell
Nginx Configuration Test Failed: Duplicate Listen Fix
How to Resolve Chrome Invalid Authority Registry Error on Windows
Fix Nginx Upstream Connection Refused & Upstream Not Found
Troubleshooting Docker Bridge Network Not Found
Common Nginx Redirect Loop Causes and Solutions
Troubleshoot 502 Bad Gateway in Docker Nginx
Fix Docker 'network not found' Error for Custom Networks
How to Restore Missing Windows Taskbar Icons
Fix Windows Security App Not Responding: Step-by-Step
Fix Chrome Black Screen on Nvidia GPU with Hardware Acceleration
Fix VSCode IntelliSense Not Working for PowerShell
Nginx Configuration Test Failed: Duplicate Listen Fix
How to Resolve Chrome Invalid Authority Registry Error on Windows
Fix Nginx Upstream Connection Refused & Upstream Not Found
Troubleshooting Docker Bridge Network Not Found
Common Nginx Redirect Loop Causes and Solutions
Troubleshoot 502 Bad Gateway in Docker Nginx
Fix Docker 'network not found' Error for Custom Networks
How to Restore Missing Windows Taskbar Icons