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 Certificate
When cloning or pulling from a Git repository, you may see:
fatal: unable to access...Fix Windows Update Service Not Running for System Restore
You might see “System Restore did not complete successfully” or “Windows Update service is not ru...
Fix Wi-Fi Adapter Not Working in Windows 11: No Internet
You connect to Wi-Fi in Windows 11, but the icon shows a globe with “No internet.” The adapter mi...
Fix 'Windows Remote Desktop Cannot Connect to This Computer'
When you see "Remote Desktop can't connect to the computer" after entering the target...
DNS Probe Finished NXDOMAIN: Internet Connection but No Browsing Fix
You see the error 'DNS probe finished NXDOMAIN' on Chrome or other browsers, yet your int...
Topic paths
Quick titles
Increase Node.js Memory Limit in Visual Studio CodeFix Cloudflare 521 Error: Step-by-StepReset Chrome When Extensions Won't LoadPython Dependency Conflict Troubleshooting GuideResolving Git SSL Certificate Problem: Local Issuer ErrorFix 'Python Command Not Found' in Git Bash on WindowsHow to Fix SSL Certificate Error in Chrome Caused by AntivirusTroubleshoot WiFi No Internet Post Windows 11 Update