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 VSCode Terminal Permission Denied in Python venv
If you see bash: /path/to/venv/bin/activate: Permission denied when trying to activa...
Nginx Redirect Loop: Common Causes and Fixes
You set up a redirect in nginx, but now your browser shows 'redirect loop' or 'too ma...
Fix Docker Volume Permission Denied in Jenkins
When running Jenkins inside a Docker container, you may encounter a permission denied error when ...
Node Sass Build Failed: Complete Troubleshooting Checklist
When you see "Node Sass does not yet support your current environment" or a build failure...
How to Fix Nginx 502 Bad Gateway in Docker
If you're running Nginx as a reverse proxy inside Docker and seeing a 502 Bad Gateway error, ...
Topic paths
Quick titles
Docker Desktop Engine Stopped After Update: FixesHow to Speed Up Cloudflare DNS Propagationnpm run build Exit Code 1 Troubleshooting GuideHow to Fix Transitive Dependency Conflicts in PythonFix Docker Build Canceled with Verbose LogsFix Docker Compose Volume Permission Denied ErrorsEdge Sync Setup for Work or School AccountsHow to Fix VS Code Git Changes Not Showing on Windows 11