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 listFixing Cloudflare 522 Error: CDN Configuration Steps
If you see a 522 Connection Timed Out error from Cloudflare, it means your CDN (...
How to Fix DNS_PROBE_FINISHED_NXDOMAIN in Chrome
When Chrome shows DNS_PROBE_FINISHED_NXDOMAIN, it means the browser can't fi...
How to Stop Windows Explorer from Triggering Automatic Repair
If Windows Explorer keeps restarting and eventually triggers Automatic Repair, you're likely ...
Fix VS Code Breakpoint Not Hit in Remote Development
You set a breakpoint in VS Code while working in a remote environment—SSH, container, or WSL—but ...
Docker No Space Left on Device Error: Fix Guide
You try to pull an image, start a container, or run a build, and Docker stops with: no spac...
Topic paths
Quick titles
Troubleshooting Bluetooth Error 0x00000001 in Windows 11Resolve UnicodeDecodeError When Reading Input in PythonResolve Python UnicodeDecodeError for UTF-16 FilesResolve Node Version Dependency ConflictsTroubleshoot Error 0x80070005 in Windows UpdateDiagnosing and Repairing Chrome Memory LeaksHow to Stop Windows 11 Update Rollback After Blue ScreenWindows 11 Taskbar Icons Missing? Fixes That Actually Work