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 notesHow to Add a Bluetooth Device in Windows 11
Adding a Bluetooth device in Windows 11 is usually straightforward, but sometimes things don'...
Fix Windows 11 WiFi No Internet Due to Proxy Settings
If your Windows 11 laptop shows full WiFi bars but browsers say “No internet,” a common culprit i...
How to Fix Windows Explorer Keeps Restarting
If Windows Explorer (the desktop, taskbar, and file manager) keeps restarting, you'll see the...
Fix NET::ERR_CERT_AUTHORITY_INVALID on Windows 10
You're browsing in Chrome or Edge and see NET::ERR_CERT_AUTHORITY_INVALID. T...
Fix Nginx Upstream Connection Refused & Upstream Not Found
When you see upstream connection refused or upstream not found in your ...
Issue queue
SitemapCloudflare 521 Error: Firewall Settings Fix
Windows 11 Setup Frozen at 99 Percent
Resolve DNS_PROBE_FINISHED_NXDOMAIN in Microsoft Edge
Nginx Too Many Redirects: Troubleshooting Guide
Troubleshooting Nginx Proxy Pass Test Failures
Troubleshooting Cloudflare SSL Full Strict Failures After Update
How to Fix Cloudflare SSL Full Strict 526 Error
Git Large File Error Fix Without LFS
Docker Compose Port Already Allocated: Checklist
How to Fix Remote Desktop Connection Timed Out Error
Fix VSCode Intellisense Slow or Lagging: Practical Steps
How to Fix Edge Sync Permission Denied Error
Windows 11 Setup Frozen at 99 Percent
Resolve DNS_PROBE_FINISHED_NXDOMAIN in Microsoft Edge
Nginx Too Many Redirects: Troubleshooting Guide
Troubleshooting Nginx Proxy Pass Test Failures
Troubleshooting Cloudflare SSL Full Strict Failures After Update
How to Fix Cloudflare SSL Full Strict 526 Error
Git Large File Error Fix Without LFS
Docker Compose Port Already Allocated: Checklist
How to Fix Remote Desktop Connection Timed Out Error
Fix VSCode Intellisense Slow or Lagging: Practical Steps
How to Fix Edge Sync Permission Denied Error