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 listCloudflare SSL Full Strict Troubleshooting Steps
If you have set Cloudflare SSL/TLS encryption to Full (strict) and your site shows errors like 52...
Fix Windows Security App Configuration Error
When you open Windows Security and see a message like "Your IT administrator has limited acce...
Fix Nginx Configuration Test: Missing Semicolon Error
When running nginx -t to test your configuration, you might see an error like:
Fix Git Clone Connection Timed Out on Windows 10
When you run git clone on Windows 10 and see a connection timed out error, it usuall...
Fix Windows 11 Blue Screen After Update Using DISM
After a Windows 11 update, some users encounter a blue screen of death (BSOD) on boot. This often...
Topic paths
Quick titles
Restore Default Taskbar Icons in Windows 11Fix Python Not Recognized in Windows 11Chrome Profile Sync Not Working After Update: FixesPython Requests Timeout Default ExplainedTroubleshoot Windows 11 No Internet Due to AntivirusFix npm package.json Not Found ErrorChrome Black Screen on Startup: Hardware Acceleration FixHow to Recover from Git Detached HEAD State