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 notesCloudflare SSL Full vs Flexible: Troubleshooting Mixed Content & Errors
If your site shows broken padlocks, mixed content warnings, or SSL errors after changing Cloudfla...
Cloudflare Origin Certificate Setup for cPanel
If you use Cloudflare as a reverse proxy, you can install a Cloudflare Origin Certificate on your...
Windows 11 Taskbar Icons Missing? Fixes That Actually Work
You boot up Windows 11 and notice the taskbar icons are gone—no Start button, no search, no syste...
Cloudflare SSL Full Strict Origin Server Troubleshooting
When you set Cloudflare SSL/TLS encryption mode to Full (strict), your browser-to-Cloudflare conn...
Chrome Status Access Violation: Fixing Extension Conflicts
If you see a 'STATUS_ACCESS_VIOLATION' error in Chrome, often accompanied by a crash or a...
Issue queue
SitemapHow to Fix Git Push Rejected Non Fast Forward
Git Unrelated Histories: Merge or Rebase?
Fix Windows Security App After Windows Update
Troubleshooting pnpm install Failure
How to Fix Chrome Sync on Corporate Networks
Windows 10 Chrome Memory Leak Fix Guide
Troubleshooting Nginx 502 Connection Refused
Stop Nginx Redirect Loop with These Checks
How to Change npm Global Install Directory
Resolve NGINX Upstream Refused SSL Errors
Understanding timeout vs timeout seconds in Requests
How to Fix Windows Defender Permission Denied Error
Git Unrelated Histories: Merge or Rebase?
Fix Windows Security App After Windows Update
Troubleshooting pnpm install Failure
How to Fix Chrome Sync on Corporate Networks
Windows 10 Chrome Memory Leak Fix Guide
Troubleshooting Nginx 502 Connection Refused
Stop Nginx Redirect Loop with These Checks
How to Change npm Global Install Directory
Resolve NGINX Upstream Refused SSL Errors
Understanding timeout vs timeout seconds in Requests
How to Fix Windows Defender Permission Denied Error