Fix Nginx Upstream Connection Refused Socket Error
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 notesHow to Fix Windows Update Error 0x80070002 with a Clean Boot
If you see error 0x80070002 when running Windows Update, it usually means a file or resource that...
Fix Cloudflare Origin Certificate Not Trusted by Browser
You've set up Cloudflare with an origin certificate, but browsers show a warning that the cer...
Fix Git Clone Connection Timed Out Due to Firewall
You run git clone and after a long pause see connection timed out. This...
Fix Bluetooth Not Showing in Device Manager on Windows 11
If you open Device Manager on Windows 11 and Bluetooth is completely absent—no adapter listed und...
Windows 11 Update Stuck at 0%: Permission Denied Fix
If your Windows 11 update is stuck at 0% with a "permission denied" message, the installe...
Issue queue
SitemapBitbucket Merge Error: Refusing to Merge Unrelated Histories
Git Detached HEAD vs Attached HEAD: What It Means and How to Fix
Step-by-Step Guide to Resolve Cloudflare 522 Error
Node.js Heap Out of Memory: Increase Memory for npm
Windows Security App Not Opening as Administrator: Fixes
Windows 11 Taskbar Icons Missing? Fixes That Actually Work
How to Fix Git Clone Timeout with SSH Key
Fix Nginx Upstream Connection Refused Timeout Error
Docker Container Exits Immediately with Volume Mount – Fixes
How to Fix Nginx Redirect Loop That Prevents Site Loading
Stop Chrome from Freezing on Startup on Your Mac
Chrome Black Screen After Update: Hardware Acceleration Fix
Git Detached HEAD vs Attached HEAD: What It Means and How to Fix
Step-by-Step Guide to Resolve Cloudflare 522 Error
Node.js Heap Out of Memory: Increase Memory for npm
Windows Security App Not Opening as Administrator: Fixes
Windows 11 Taskbar Icons Missing? Fixes That Actually Work
How to Fix Git Clone Timeout with SSH Key
Fix Nginx Upstream Connection Refused Timeout Error
Docker Container Exits Immediately with Volume Mount – Fixes
How to Fix Nginx Redirect Loop That Prevents Site Loading
Stop Chrome from Freezing on Startup on Your Mac
Chrome Black Screen After Update: Hardware Acceleration Fix