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 listFixing 'Context Canceled' Errors During Docker Image Builds
When building a Docker image, you might see an error like context canceled or ...
How to Generate a Cloudflare Origin Certificate
If you're using Cloudflare as a reverse proxy, you may want to encrypt traffic between your s...
Fix Windows Defender Real-Time Protection Stuck on Turning Off
You open Windows Security, go to Virus & threat protection, and see Real-time protection stuc...
Fix ERR_NAME_NOT_RESOLVED on All Sites in Chrome
If Chrome shows ERR_NAME_NOT_RESOLVED on every site you visit, it means your bro...
Fix Git Push Non-Fast-Forward and Permission Denied Errors
When you run git push and get an error like ! [rejected] main -> main (non-...
Topic paths
Quick titles
Wildcard Subdomain Caching Issues in CloudflareHow to Restore Missing Taskbar Icons in WindowsCloudflare DNS Propagation: How Long Does It Take?How to Add Python 3.10 to PATH on Windows 10Fix Nginx 502 Bad Gateway in Docker ContainersFixing Git Push Rejected: Non-Fast-ForwardTroubleshooting Nginx Upstream Connection Refused in DockerHow to Enable Windows Update Service via Group Policy