🌐 Networking Tutorials

Diagnose connection failures, see what is listening, trace where a request breaks down, and find the tool for each layer of the problem.

The records you encounter when setting up a domain, configuring email, debugging a site that is not resolving, or pointing a subdomain at a new service.

Install WireGuard on a Linux server, generate keys, configure the server and one client, and have an encrypted tunnel running with internet traffic routed through it.

Carve a /24 into four equal sub-networks, assign them sensibly, and understand why the math works without memorizing a table.