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 listHow to Push a Git Detached HEAD to Remote
You're working on a Git repository and realize you're in a 'detached HEAD' state....
Fix Windows 11 Update Stuck at 0% – BITS Service Issues
You click 'Check for updates' in Windows 11, and it sits at 0% for minutes or hours. Ofte...
How to Reduce Chrome Memory Usage: Practical Fixes
Chrome is known for eating up RAM, especially when you have many tabs open. If your system slows ...
Chrome Memory Saver Mode Not Working: Quick Fixes
If Chrome's Memory Saver mode isn't activating or saving memory as expected, you're n...
Fix Windows Update Error 0x80070005 Using Command Prompt
Windows Update error 0x80070005 typically indicates an access denied problem. This often happens ...
Topic paths
Quick titles
Firefox Secure Connection Failed: Practical FixesDocker Compose Ignoring Default Environment VariableWindows Defender Real-Time Protection Access Denied FixCloudflare 521 Error: Fixing WordPress Connection IssuesVS Code PowerShell Scripts Blocked – Quick FixNginx Upstream Connection Refused Error FixFix Windows Cannot Access Shared Folder with Password Protected SharingChrome Black Screen After Update? Hardware Acceleration Fix