Nginx Upstream Connection Refused: Diagnosis and Fixes
When Nginx returns a 502 Bad Gateway or logs "upstream connection refused", it means Ngin...
Software troubleshooting desk
Practical fixes for tool errors, setup blocks, and workflow issues.
Symptom
Cause
Fix route
Verify
Fresh repair notes
All notesFix Nginx 502 Bad Gateway with Docker Socket
You have an Nginx container proxying requests to another container via the Docker socket, and you...
Fix Windows Defender Blocked by Third-Party Antivirus
You open Windows Security and see a yellow warning: "Real-time protection is off. Your device...
How to Fix Git Clone Timeout on Linux
When you run git clone on a Linux machine and it hangs or fails with a timeout error...
How to Fix Windows Update Service Disabled
If your Windows Update service is disabled, you'll likely see error messages like "Window...
Fix Windows 11 Installation Assistant Stuck at 99%
You're running the Windows 11 Installation Assistant, it reaches 99%, and then sits there. No...
Issue queue
SitemapTroubleshoot Folder Exclusion in Windows Search
VS Code Breakpoint Greyed Out: Causes and Solutions
Fixing Nginx Upstream Connection Refused on Port 443
Troubleshooting Nginx Upstream Connection Refused Port 80
Fix Windows 11 Wi-Fi No Internet with IPv6 Off
Python Requests Timeout: Per-Request Configuration
How to Turn Windows Defender Real-Time Protection Back On
Fix Missing Environment Variables in Docker Build
Troubleshooting Docker Overlay Network Not Found
Resolve Git Push Rejected Non Fast Forward
Dart/Flutter IntelliSense Not Working in VSCode: Fixes
Fix Nginx Upstream Connection Refused in Docker
VS Code Breakpoint Greyed Out: Causes and Solutions
Fixing Nginx Upstream Connection Refused on Port 443
Troubleshooting Nginx Upstream Connection Refused Port 80
Fix Windows 11 Wi-Fi No Internet with IPv6 Off
Python Requests Timeout: Per-Request Configuration
How to Turn Windows Defender Real-Time Protection Back On
Fix Missing Environment Variables in Docker Build
Troubleshooting Docker Overlay Network Not Found
Resolve Git Push Rejected Non Fast Forward
Dart/Flutter IntelliSense Not Working in VSCode: Fixes
Fix Nginx Upstream Connection Refused in Docker