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 notesFixing Nginx Permission Denied Due to SELinux Context
You've configured nginx, but when you try to access your site, you see a 403 Forbidden<...
How to Enable Bluetooth Service in Windows 11
If Bluetooth suddenly stops working in Windows 11—the icon disappears, devices won't pair, or...
Node.js Memory Limit Increase Not Working: Fixes
You set --max-old-space-size=4096 but Node.js still crashes with a memory error. Thi...
How to Recover from a Detached HEAD in Git After a Rebase
You're in the middle of a rebase, you see a message like 'detached HEAD', and you'...
Fixing Nginx 502 Bad Gateway in Docker WordPress Setups
If you're running WordPress in Docker behind an Nginx reverse proxy, a 502 Bad Gateway error ...
Issue queue
Sitemap522 Connection Timed Out: Cloudflare CDN Troubleshooting
How to Fix npm ERR! enoent ENOENT package.json Missing
Fix Edge Sync Stuck on Preparing Sync
Chrome Certificate Error: Not Secure Site Workaround
Fix Cloudflare Wildcard Subdomain Page Rule Not Working
Fix Explorer.exe Keeps Restarting in Windows 10
Explorer.exe Restart Loop: Windows 10 Troubleshooting Guide
Docker Permission Denied: Volumes vs Bind Mounts
How to Fix Cloudflare Origin SSL After Renewal
Troubleshoot Windows 11 Update Stuck at 0 Percent
How to Reduce Chrome Memory Usage: Practical Fixes
Nginx Upstream Connection Refused: Cloudflare Fix Guide
How to Fix npm ERR! enoent ENOENT package.json Missing
Fix Edge Sync Stuck on Preparing Sync
Chrome Certificate Error: Not Secure Site Workaround
Fix Cloudflare Wildcard Subdomain Page Rule Not Working
Fix Explorer.exe Keeps Restarting in Windows 10
Explorer.exe Restart Loop: Windows 10 Troubleshooting Guide
Docker Permission Denied: Volumes vs Bind Mounts
How to Fix Cloudflare Origin SSL After Renewal
Troubleshoot Windows 11 Update Stuck at 0 Percent
How to Reduce Chrome Memory Usage: Practical Fixes
Nginx Upstream Connection Refused: Cloudflare Fix Guide