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 notesBluetooth Troubleshooting Checklist for Windows 11
Bluetooth on Windows 11 can be unreliable. If your device won't pair, keeps dropping, or does...
How to Fix Chrome Black Screen After Turning Off Hardware Acceleration
If you turned off hardware acceleration in Chrome and now see a black screen, you're not alon...
Fix Cloudflare Wildcard Subdomain DNS Propagation Delay
You set up a wildcard DNS record (e.g., *.example.com) in Cloudflare, but new subdom...
How to Fix Windows 11 Installation Assistant Stuck at 99%
You're running the Windows 11 Installation Assistant, it reaches 99%, and then... nothing. Th...
How to Fix Nginx 'Upstream Connection Refused' Error
When Nginx returns a 502 Bad Gateway with upstream connection refused in the error l...
Issue queue
SitemapWindows 11 WiFi Connected but No Internet Fix
Cloudflare DNS Propagation Stuck for www Record
Fix VSCode Git Authentication Failed on Windows
Windows Update Error 0x80070002 Component Reset Guide
How to Fix npm ENOENT package.json Not Found on Mac
Fix Docker 'No Space Left on Device' Volume Error
Resolve Chrome Status Access Violation Error Guide
Node.js Memory Leak Detection: Tools and Practical Fixes
Resolve Chrome Access Violation on PDF
Fix Nginx 502 Bad Gateway in Docker Containers
Nginx 502 Bad Gateway in Docker PHP-FPM: How to Fix
How to Fix npm install Permission Denied with nvm
Cloudflare DNS Propagation Stuck for www Record
Fix VSCode Git Authentication Failed on Windows
Windows Update Error 0x80070002 Component Reset Guide
How to Fix npm ENOENT package.json Not Found on Mac
Fix Docker 'No Space Left on Device' Volume Error
Resolve Chrome Status Access Violation Error Guide
Node.js Memory Leak Detection: Tools and Practical Fixes
Resolve Chrome Access Violation on PDF
Fix Nginx 502 Bad Gateway in Docker Containers
Nginx 502 Bad Gateway in Docker PHP-FPM: How to Fix
How to Fix npm install Permission Denied with nvm