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 listCloudflare 522 Error: Server Response Time Troubleshooting
You're browsing a site and get a Cloudflare 522 error—'Connection timed out' or '...
Fix 'pip externally managed environment' Error for venv Setup
When creating a Python virtual environment on newer Linux distributions (e.g., Debian 12, Ubuntu ...
Passing Environment Variables to Docker Compose: A Practical Guide
When you run a multi-container application with Docker Compose, you often need to configure servi...
Fix VSCode IntelliSense Not Working with TypeScript
You open a TypeScript file in VSCode, start typing, and get no autocomplete, no hover info, no er...
Fix Windows Update Service Not Running Due to Group Policy
If Windows Update shows the service is not running and you suspect Group Policy, the problem is o...
Topic paths
Quick titles
Troubleshooting Git Clone Timeout in CodeCommitDocker Build Canceled: Verbose Logging FixResolving Permission Denied for Cloudflare Origin CertCloudflare Wildcard Proxy Error GuideFix Windows 11 No Internet but Wi-Fi Connected DNS IssueHow to Fix npm ERR! enoent ENOENT: package.json MissingWindows Indexing Configuration GuideHow to Activate Python Virtual Environment in Windows CMD