Dropped here or never arrived: one capture decides
Capture the packet on the server while a client probes from outside, and let the presence or absence of the SYN say whether this machine dropped it or never received it.
22 minutesTechnical content last reviewed on 13 Sept 2026
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What this lesson builds
- Working out why a service cannot be reached
- Saying what an output proves, and what it leaves open
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Hosting a web application with Nginx
Serve a React/Vite build, put a Node.js or Next.js application behind a reverse proxy, and move to HTTPS.
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