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 'Port Already Used by Another Container' in Docker Compose
When you run docker compose up and see an error like port is already allocated...
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 ...
Fix npm install Permission Denied on Windows 10
You run npm install on Windows 10 and see errors like Error: EPERM: operation ...
How to Fix Nginx 502 Bad Gateway in Docker Compose
If you're running an application with Docker Compose and Nginx as a reverse proxy, a 502 Bad ...
Fixing Cloudflare 521 Error After Server Restart
You restart your server, wait for it to come back up, then visit your site—only to see a Cloudfla...
Topic paths
Quick titles
Cloudflare Full Strict SSL Certificate Mismatch SolutionResolving Git SSL Certificate Problems on Linux macOS WindowsFixing Git Push Rejected Error During RebaseTroubleshoot VS Code Terminal and CondaChrome Extensions Not Loading: Fixes for Common IssuesResolve Windows Update 0x80070002 Network ErrorDocker Compose Multiple Environment Files Not Merging? Fix HereTroubleshooting Windows Workgroup Sharing Errors