networking - ITNotes

Networking tutorial - IT technology blog

IPv4 Subnetting Tutorial: How to Calculate Subnets Without Losing Your Mind

March 6, 2026

IPv4 subnetting is the skill that separates networking theory from practical network engineering. This tutorial walks through subnet calculations, CIDR notation, VLSM, and real-world allocation strategies with Python and Linux command examples.

Networking

How to Set Up WireGuard VPN Server on Linux (Fast & Secure)

March 5, 2026

WireGuard is the fastest, simplest way to run a self-hosted VPN server — far less painful than OpenVPN or IPsec. This guide walks through server setup, key generation, peer configuration, and firewall rules on Ubuntu Linux, from a clean install to a working tunnel.