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 'pip externally managed environment' Error in Python 3.12
If you're using Python 3.12 on a modern Linux distribution (like Fedora 38+, Ubuntu 23.04+, o...
Fix Nginx Upstream Connection Refused in Docker
You have Nginx running, either on the host or in a container, proxying to another Docker containe...
Fix Cloudflare Origin Certificate with Let's Encrypt
If your origin server is rejecting the Cloudflare origin certificate—perhaps because of a SAN mis...
Fixing Nginx 502 Bad Gateway in Docker: Practical Steps
You set up Nginx as a reverse proxy in Docker, but instead of your app you see a 502 Bad Gateway....
Fix 'Windows Cannot Access Shared Folder' After Update
After a recent Windows update, you might see the error “Windows cannot access \\computername\shar...
Topic paths
Quick titles
Nginx Rewrite Rule Loop: Diagnosis and SolutionHow to Use Git LFS Migrate and Push CorrectlyResolve Git Clone Connection Timeout ErrorFix Cloudflare Wildcard Subdomain Issues After SSL ChangePractical Chrome Memory Management TipsFix Node Version Errors When Installing PackagesGit Pull Refusing to Merge Unrelated Histories FixTroubleshooting Nginx Syntax Error on Config Test