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 Update Error 0x80070002 on Windows 11
If you see error 0x80070002 when running Windows Update on Windows 11, it usually means Windows c...
VS Code Source Control Not Detecting Changes on Mac: Fixes
You make edits in VS Code on your Mac, but the Source Control panel shows nothing. No files appea...
How to Fix Git 'index.lock' File Exists Error
When you see fatal: Unable to create 'path/.git/index.lock': File exists., G...
Fix 'Permission Denied' in VS Code Terminal on Mac
You're working in VS Code on a Mac, and when you try to run a command in the integrated termi...
Fix 'No Space Left on Device' with Docker Devicemapper
If you're running Docker with the devicemapper storage driver and see no s...
Topic paths
Quick titles
Python Large File Generation: Memory Error SolutionsDNS Probe Finished NXDOMAIN: Troubleshooting ChecklistHow to Solve Nginx Upstream Permission DeniedFix Windows Defender Real-Time Protection with Registry EditWhy Cloudflare Full Strict Is Not WorkingWindows 11 Bluetooth Not Working Service GuideNginx Socket Permission Denied FixNginx 502 Bad Gateway Docker: Causes and Solutions