How to Fix Nginx Upstream Connection Refused on Port 80
When nginx logs show "upstream connection refused" while connecting to port 80, it means ...
Software troubleshooting desk
Practical fixes for tool errors, setup blocks, and workflow issues.
Symptom
Cause
Fix route
Verify
Fresh repair notes
All notesFix Windows Update Error 0x800f081f with Media Creation Tool
If you see error 0x800f081f when running Windows Update, it usually means a system file or compon...
How to Use a Cloudflare DNS Propagation Checker Tool
After you change a DNS record in Cloudflare, it takes time for the update to spread across the in...
Nginx Configuration Test Failed: Fix Server Block Errors
When you run nginx -t and see "test failed" with a server block error, it us...
Cloudflare DNS Not Propagating for Subdomain: Fixes
You added a subdomain record in Cloudflare DNS, but it still resolves to the old IP or nothing at...
Fix VSCode Permission Denied Extension Errors
If you see a "permission denied" error when trying to install or update an extension in V...
Issue queue
SitemapGit Bash Python venv Activation Fix
Chrome ERR_CONNECTION_RESET: Network Settings Fix
DNS Probe Finished NXDOMAIN Error Explained
Troubleshoot Python Dependency Conflicts Step by Step
How to Unblock Windows Security App
Fix Git SSL Certificate Problem on macOS: Unable to Get Local Issuer
Cloudflare Wildcard Subdomain Redirect Loop: How to Fix
How to Fix Edge Sync Stuck on Preparing Sync
Fix Origin Server Errors for Wildcard Subdomains
Nginx Redirect Loop: Server Block Fix
How to Fix VS Code Source Control Not Detecting Changes
Git Clone Fails with Timeout in VS Code
Chrome ERR_CONNECTION_RESET: Network Settings Fix
DNS Probe Finished NXDOMAIN Error Explained
Troubleshoot Python Dependency Conflicts Step by Step
How to Unblock Windows Security App
Fix Git SSL Certificate Problem on macOS: Unable to Get Local Issuer
Cloudflare Wildcard Subdomain Redirect Loop: How to Fix
How to Fix Edge Sync Stuck on Preparing Sync
Fix Origin Server Errors for Wildcard Subdomains
Nginx Redirect Loop: Server Block Fix
How to Fix VS Code Source Control Not Detecting Changes
Git Clone Fails with Timeout in VS Code