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 notesNginx Upstream Connection Refused: Diagnosis and Fixes
When Nginx returns a 502 Bad Gateway or logs "upstream connection refused", it means Ngin...
How to Fix Nginx Upstream Connection Refused on Port 80
When nginx logs show "upstream connection refused" while connecting to port 80, it means ...
Cloudflare SSL Full Strict Not Working? Try These Fixes
You've set Cloudflare SSL/TLS encryption mode to Full (Strict), but your site shows a secure ...
Windows 11 Installation Assistant Not Completing Setup: Fixes
You launch the Windows 11 Installation Assistant, it runs for a while, then either stalls, throws...
Docker Container Exits Immediately with Volume Mount – Fixes
You start a Docker container with a volume mount, and it exits immediately – no error, or just a ...
Issue queue
SitemapHow to Speed Up Cloudflare DNS Propagation
Overcoming 'remote origin already exists' in Git
VS Code Terminal Not Opening on Mac: Troubleshooting Guide
Fix Nginx Upstream Connection Refused Behind Cloudflare
Python Requests Timeout Not Working: Fixes & Checks
How to Fix Git SSL Certificate Error on GitHub
How to Free Up Disk Space in Docker Container
Cloudflare 521 Error: Troubleshooting and Fixes
Windows 11 Update Stuck at 0%: Permission Denied Fix
Fix ENOENT Error: package.json Not Found in React App
How to Add Anaconda Python to Windows PATH
How to Stop Antivirus from Blocking Edge Sync
Overcoming 'remote origin already exists' in Git
VS Code Terminal Not Opening on Mac: Troubleshooting Guide
Fix Nginx Upstream Connection Refused Behind Cloudflare
Python Requests Timeout Not Working: Fixes & Checks
How to Fix Git SSL Certificate Error on GitHub
How to Free Up Disk Space in Docker Container
Cloudflare 521 Error: Troubleshooting and Fixes
Windows 11 Update Stuck at 0%: Permission Denied Fix
Fix ENOENT Error: package.json Not Found in React App
How to Add Anaconda Python to Windows PATH
How to Stop Antivirus from Blocking Edge Sync