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 Errors with Load Balancer Setup
If you see a Cloudflare 522 error, the connection between Cloudflare and your origin server timed...
Fix Docker Volume Permission Denied as Root
You start a container as root, mount a volume, and get a 'permission denied' error. This ...
Docker Container Exits Immediately with Volume Mount – Fixes
You start a Docker container with a volume mount, and it exits immediately – no error, or just a ...
Fix Windows Update Error 0x80070002 with System File Checker
When Windows Update fails with error 0x80070002, it often points to missing or corrupted system f...
VS Code Debugger Not Hitting Breakpoints in Node.js: Fixes
You set breakpoints in your Node.js code, start the debugger, and the execution runs straight thr...
Topic paths
Quick titles
Step-by-Step Cloudflare Origin Certificate SetupTroubleshooting Git Large File Limit ErrorsHow to Fix Docker Pull Unauthorized Access DeniedHow to Force Git Merge Unrelated BranchesVS Code PowerShell Permission Denied TroubleshootingFix VS Code Terminal Not Opening on Windows 10Fix Docker Build Context Canceled by Symlink ErrorsNode Version Not Supported by npm Package – Fix