Fix Nginx Upstream Connection Refused Socket Error
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 Fix 'Remote Desktop Credentials Did Not Work'
When you try to connect to a remote PC via Remote Desktop and see 'Your credentials did not w...
How to Fix ERR_NAME_NOT_RESOLVED via Router Settings
If you see ERR_NAME_NOT_RESOLVED in Chrome, your browser can't translate the...
Fix Remote Desktop Connection Failed: Permission Denied
You try to connect to a remote Windows machine via RDP and get "permission denied" or ...
VSCode Breakpoint Not Hit Due to Source Maps: Fix
You set a breakpoint in your TypeScript or React source file, start debugging, and the breakpoint...
Fix Chrome Access Violation Error on Mac
If you see an "access violation" error in Chrome on your Mac, it usually means the browse...
Topic paths
Quick titles
Troubleshoot Git Merge Conflict Exit Code 128Chrome Access Violation Error: Windows 7 Fix GuideCloudflare DNS Propagation: How to Check and Fix DelaysHow to Handle Non-Fast-Forward UpstreamHow to Fix Nginx 502 Upstream Connection RefusedHow to Restore Missing Taskbar IconsChrome Extensions Not Loading on Mac? Here's How to Fix ItVolume Mount Causing Docker Container to Exit – Solutions