The headers you think you set
Why one add_header inside a location erases every header set above it, why your error pages carry none at all, and how to check it in three requests.
22 minutesTechnical content last reviewed on 17 Sept 2026
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What this lesson builds
- Serving a site and putting an application behind Nginx
- Knowing what the machine exposes, and closing the rest
End of the course
ISPConfig: hosting several sites on one server
Install the ISPConfig panel on Ubuntu Server, understand what it automates, and host a site and then a Node.js application on it.
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