How to Fix Nginx Upstream Connection Refused on Port 80
When nginx logs show "upstream connection refused" while connecting to port 80, it means ...
Checklists for software errors, setup, and tool workflows.
1. Reproduce
2. Isolate
3. Apply
4. Verify
Latest checklists
View listNginx Permission Denied After Restart: Fixes That Work
After restarting nginx, you might see errors like connect() to unix:/var/run/php-fpm.sock f...
Fix npm install Permission Denied on node_modules
When you run npm install and see a permission denied error involving node_modu...
Fix npm ERR! enoent ENOENT: package.json Not Found in node_modules
You run npm install or npm start and get something like:
...Fix Git SSL Certificate Problem on Windows: Unable to Get Local Issuer
If you see fatal: unable to access 'https://...': SSL certificate problem: unable t...
How to Fix Nginx Redirect Loop Infinite Redirect
If you see a browser error like "ERR_TOO_MANY_REDIRECTS" or "redirect loop", Ngin...
Topic paths
Quick titles
Troubleshooting Cloudflare 521 Connection ErrorDocker Desktop Engine Stuck: How to Fix ItWindows Update Service Not Running After Clean Boot FixQuick Fixes for ERR_CONNECTION_RESET in Chrome MobileDebugging C++ in VS Code: Breakpoints Not HitNode.js OOM When Parsing JSON: Solutions and WorkaroundsWindows Security App Disappeared from Start MenuTroubleshoot Windows Update Service Stopped in Event Viewer