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 Git SSL Certificate Error: Unable to Get Local Issuer
If you see the error fatal: unable to access 'https://...': SSL certificate problem...
Cloudflare Origin Certificate Not Showing in Dashboard: Fix
If you've generated a Cloudflare origin certificate but it doesn't appear in your dashboa...
Fix Windows Taskbar Icons Missing After Driver Update
After a driver update, your Windows taskbar icons might disappear, leaving empty spaces or no ico...
How to Re-enable IntelliSense in VS Code When It's Disabled
If IntelliSense suddenly stops working in Visual Studio Code—no suggestions pop up as you type, o...
Fix Edge Sync Not Working After Update
After a browser update, you might find that bookmarks, passwords, or other settings no longer syn...
Topic paths
Quick titles
Fix Error 0x800f081f in Windows 11: Step-by-Step GuideHow to Fix Node.js Engine Check Failed ErrorResolve Nginx 502 with Docker and PHP-FPMDocker Desktop Engine Stops After Sleep: How to FixFix npm EACCES Permission Denied for Global InstallTroubleshooting Port Already Allocated in Docker ComposeHow to Resolve npm enoent ENOENT package.json ErrorDNS_PROBE_FINISHED_NXDOMAIN: ipconfig flushdns Not Working