Fix Nginx Upstream Connection Refused Socket Error
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 Git Clone Timeout by Adjusting Config Settings
When git clone fails with a timeout error, it's often because the connection is ...
Fix Nginx Upstream Connection Refused & Upstream Not Found
When you see upstream connection refused or upstream not found in your ...
Fixing Node Sass Build Failures in package.json
When you see 'node sass build failed' in your terminal, it usually means node-sass can...
How to Fix Cloudflare 522 Error (Firewall Blocking)
If you see a Cloudflare 522 error, the connection between Cloudflare and your origin server timed...
Cloudflare DNS Propagation Error Fix: Step-by-Step Guide
You updated your DNS records in Cloudflare, but hours later the changes aren't showing. Visit...
Topic paths
Quick titles
How to Fix Nginx Redirect Loop: Step-by-Step TroubleshootingHow to Speed Up Cloudflare Wildcard DNSTroubleshooting Chrome Sync Issues with Google Family LinkHow to Restore IntelliSense in VS Code After UpdateChrome Black Screen After Update: Hardware Acceleration FixHow to Enable Defender Real-Time Protection After Clean BootNginx Upstream Connection Refused FixHow to Clean Up Docker Volume Space