How to Fix Nginx Upstream Connection Refused on Port 80
When nginx logs show "upstream connection refused" while connecting to port 80, it means ...
Checklists for software errors, setup, and tool workflows.
1. Reproduce
2. Isolate
3. Apply
4. Verify
Latest checklists
View listFix Cloudflare Origin Certificate Error After SSL Change
You changed your SSL/TLS setting in Cloudflare (for example, from Flexible to Full or Full Strict...
Docker Compose Environment Variable Not Working: Fixes
You define a variable in a .env file or directly in docker-compose.yml, but your container sees n...
Chrome Using Too Much RAM? Here's How to Fix It
If your computer slows down or fans spin up when Chrome is open, you're likely seeing Chrome ...
Cloudflare Wildcard Subdomain Troubleshooting Checklist
When you set up a wildcard DNS record (e.g., *.example.com) in Cloudflare, subdomain...
Docker Compose Environment Variable from Shell Not Working: Fixes
You set an environment variable in your shell, but Docker Compose ignores it. This is a common pi...
Topic paths
Quick titles
Fix Chrome ERR_CONNECTION_RESET Error with Cache ClearAdding a Wildcard Subdomain in Cloudflare DNSHow to Resolve Edge Sync Error 0x80070424Nginx 502 Error with Docker WordPress: FixesFix Windows Update Error 0x80070002 StuckFix Windows Defender Blocked by Third-Party AntivirusDocker Login Access Denied: Common FixesWSL Terminal Not Working in VS Code