How to Fix Nginx Upstream Connection Refused on Port 80
When nginx logs show "upstream connection refused" while connecting to port 80, it means ...
Checklists for software errors, setup, and tool workflows.
1. Reproduce
2. Isolate
3. Apply
4. Verify
Latest checklists
View listFix 'Git Remote Origin Already Exists' Error
When you run git remote add origin <url> and see fatal: remote origin al...
Fix Cloudflare Wildcard Subdomain Not Working
If you've set up a wildcard DNS record in Cloudflare (e.g., *.example.com) but s...
Fix Nginx 502 Bad Gateway: Upstream Connection Refused
If you're seeing a 502 Bad Gateway error with "upstream connection refused" in your N...
How to Fix Nginx Redirect Loop from HTTP to HTTPS
If you're seeing an infinite redirect loop when trying to force HTTPS in nginx, the browser u...
Fix Windows Search Indexing Service Not Running
If Windows Search stops returning results or the search box shows no activity, the indexing servi...
Topic paths
Quick titles
How to Fix Docker Disk Full Error from LogsPermanently Increase Node.js Heap SizeFixing Python UnicodeDecodeError in ftplibFix pnpm Not Working After Node.js UpdateWhy Your Cloudflare Wildcard Page Rule Isn't WorkingHow to Unstick Windows 11 Installation Assistant at 99%Docker Disk Full on Mac: Quick FixesChrome Startup Crash Repair Steps