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 node-sass Build Failed: node-gyp Rebuild Error
If you see node-sass build failed with node-gyp rebuild in your termina...
Fix Windows Defender Real-Time Protection Configuration Error
You open Windows Security and see a message that real-time protection is turned off or has a conf...
Setup Cloudflare Origin Certificate for Nginx
If you use Cloudflare as a reverse proxy, enabling HTTPS between Cloudflare and your Nginx server...
Fix npm install Permission Denied When Using nvm
If you see 'EACCES: permission denied' when running npm install while using ...
Fix Chrome Status Access Violation Registry Error
You open Chrome and see an error like STATUS_ACCESS_VIOLATION or a crash with that c...
Topic paths
Quick titles
Fix Firefox Secure Connection Failed DNS ErrorWindows 11 Update Blue Screen Rollback FixHow to Fix Windows Update Service Not Running After UpdateVS Code Integrated Terminal Command Not Found GuideNginx Socket Permission Denied FixAll Websites Show Secure Connection Failed in Firefox: SolutionsHow to Fix pip Permission Denied on UbuntuFix Windows Defender Real-Time Protection Stuck Off in Windows 11