Fixing Nginx Upstream Connection Refused on Port 443
You see "upstream connection refused" in your Nginx error log when proxying requests to p...
Software troubleshooting desk
Practical fixes for tool errors, setup blocks, and workflow issues.
Symptom
Cause
Fix route
Verify
Fresh repair notes
All notesFix Windows 11 Bluetooth Not Connecting: Practical Steps
You try to connect a Bluetooth device—headphones, mouse, keyboard—but Windows 11 either doesn'...
Firefox Secure Connection Failed: Date and Time Fix
If you see a 'Secure Connection Failed' error in Firefox that mentions date or time, it u...
Nginx Redirect Loop Not Working: Causes and Fixes
You've set up a redirect in Nginx, but instead of landing on the intended URL, the browser sh...
Fix DNS Probe Finished NXDOMAIN on Google DNS Setup
If you see "DNS probe finished NXDOMAIN" in your browser, it means your device couldn'...
Docker Image Pull Access Denied: Troubleshooting Checklist
When you run docker pull and get an access denied error, it usually mea...
Issue queue
SitemapWindows 11 Installation Assistant Not Responding – 99% Hang Fix
How to Fix Firefox Secure Connection Failed Malware Warnings
Windows Security App Won't Open Administrator
Resolve DNS Probe Finished NXDOMAIN Post-Update
Resolve Git SSL Certificate Error on macOS
Fix 'Externally Managed Environment' Error in pip
Nginx Upstream Connection Refused: Quick Fix
Fix Chrome High RAM Usage from Hardware Acceleration
Troubleshooting VS Code Java Language Server Issues
How to Fix 'Permission Denied' When Using pip in Docker
How to Resolve Windows Cannot Access Shared Folder in HomeGroup
Windows 11 Update Stuck at 0%: Manual Download Fix
How to Fix Firefox Secure Connection Failed Malware Warnings
Windows Security App Won't Open Administrator
Resolve DNS Probe Finished NXDOMAIN Post-Update
Resolve Git SSL Certificate Error on macOS
Fix 'Externally Managed Environment' Error in pip
Nginx Upstream Connection Refused: Quick Fix
Fix Chrome High RAM Usage from Hardware Acceleration
Troubleshooting VS Code Java Language Server Issues
How to Fix 'Permission Denied' When Using pip in Docker
How to Resolve Windows Cannot Access Shared Folder in HomeGroup
Windows 11 Update Stuck at 0%: Manual Download Fix