Fix Nginx Upstream Connection Refused in Proxy Pass
When Nginx returns a 502 Bad Gateway or logs upstream connection refused
Checklists for software errors, setup, and tool workflows.
1. Reproduce
2. Isolate
3. Apply
4. Verify
Latest checklists
View listFix Windows Defender Real-Time Protection Not Turning On After Update
After a Windows Update, you might find that Windows Defender's real-time protection is stuck ...
Fix Nginx 'Permission Denied' Upstream Errors
When Nginx logs permission denied while connecting to an upstream (e.g., a Unix sock...
How to Add a Bluetooth Device in Windows 11
Adding a Bluetooth device in Windows 11 is usually straightforward, but sometimes things don'...
Fix VS Code Terminal Not Opening with Conda Environment
You open VS Code, try to launch the integrated terminal, and nothing happens—or the terminal open...
How to Recover Stashed Changes in Git Detached HEAD
If you've stashed changes while in a detached HEAD state in Git, you might worry they're ...
Topic paths
Quick titles
Fix Missing Taskbar Icons in WindowsFix Chrome Startup Crash After ResetHow to Solve Nginx Config File Permission DeniedBluetooth Pairing Issues Windows 11 – Solutionsnpm package.json Not Found After npm init FixPython Not Recognized in Windows 10 Command Prompt – FixFix ERR_CONNECTION_RESET on Chrome for AndroidSafe Docker Desktop Engine Reinstall Guide