Sadservers Day3: Debugging an Nginx "Connection Refused" Error SadServers Problem

Aug 22, 2025 · 4 min read · The Problem Statement A classic issue with an Nginx web server managed by systemd where curling the curl -I 127.0.0.1:80 returns this frustrating response: curl: (7) Failed to connect to localhost port 80: Connection refused At first glance, this te...