Fix Nginx Upstream Connection Refused in Proxy Pass
When Nginx returns a 502 Bad Gateway or logs upstream connection refused
Software troubleshooting desk
Practical fixes for tool errors, setup blocks, and workflow issues.
Symptom
Cause
Fix route
Verify
Fresh repair notes
All notesFix Git Clone Connection Timed Out on AWS CodeCommit
If you're seeing git clone connection timed out when trying to clone a repositor...
Fix 'Permission Denied' in VS Code Terminal for Python
You're in VS Code, you open the terminal, type python script.py, and get p...
How to Fix Git Merge Conflict Permission Denied Errors
You're in the middle of a git merge, and instead of the usual conflict markers, you see
Fix Blue Screen After Windows 11 Feature Update
After installing a Windows 11 feature update, some users encounter a blue screen error (BSOD) on ...
Win 11 WiFi Connected But No Internet: IPConfig Release/Renew Fix
You're connected to WiFi, the icon shows full bars, but websites won't load. This usually...
Issue queue
SitemapPython Requests Timeout: How to Set It Correctly
How to Fix ERR_NAME_NOT_RESOLVED on Chrome for Android
Fix Windows Security App Error 0x80070424
Fix 'Git Remote Origin Already Exists' Error
Windows 11 No Internet on WiFi – Other Devices Work
Permission Denied Error with pip install --user
How to Fix 'Port Already Allocated' in Docker Compose
Fix Windows Defender Real-Time Protection Permission Denied
Nginx 502 Error with Docker WordPress: Fixes
Docker Compose Port Already Allocated: Fixes & Checks
Troubleshooting Cloudflare DNS Propagation Delays
Fix Git Clone Connection Timed Out Due to Firewall
How to Fix ERR_NAME_NOT_RESOLVED on Chrome for Android
Fix Windows Security App Error 0x80070424
Fix 'Git Remote Origin Already Exists' Error
Windows 11 No Internet on WiFi – Other Devices Work
Permission Denied Error with pip install --user
How to Fix 'Port Already Allocated' in Docker Compose
Fix Windows Defender Real-Time Protection Permission Denied
Nginx 502 Error with Docker WordPress: Fixes
Docker Compose Port Already Allocated: Fixes & Checks
Troubleshooting Cloudflare DNS Propagation Delays
Fix Git Clone Connection Timed Out Due to Firewall