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 listHow to Add a Bluetooth Device in Windows 11
Adding a Bluetooth device in Windows 11 is usually straightforward, but sometimes things don'...
Windows 11 Update Stuck at 0% Due to Corrupt Files: Fixes
You start a Windows 11 update, and it hangs at 0% for minutes or hours. Corrupt system files are ...
Update Git SSL Certificates to Fix 'unable to get local issuer'
If you see fatal: unable to access 'https://...': SSL certificate problem: unable t...
Windows 10 Taskbar Icons Not Responding: Practical Fixes
If your Windows 10 taskbar icons stop responding—clicking does nothing, right-click menus don'...
Fixing Python UnicodeDecodeError When Reading CSV Files
You're trying to read a CSV file in Python and you get UnicodeDecodeError: 'utf-8&#...
Topic paths
Quick titles
VS Code Git Changes Not Detected After Clone: FixesGit Merge Conflict Resolution Tool Setup GuideFix Windows 11 Blue Screen After Update Stuck in Restart LoopTroubleshoot Stuck Windows Search IndexerHow to Stop Nginx HTTPS Redirect LoopHow to Flush DNS on Windows 11 to Fix Internet IssuesFix ERR_NAME_NOT_RESOLVED with CMD: Step-by-Step GuideGit Error: Remote Origin Already Exists – Fix