February 2026

Recreating a Real-World BGP Hijack with the Kathará Network Emulator

February 16, 2026 - Learning IP, Network Simulation, Open Source Networking

Use the Kathará network emulator to recreate one of the most famous BGP hijacking incidents in Internet history, the 2008 YouTube hijack. By building a small network topology and simulating a similar attack, you will learn both the fundamentals of Kathará and to gain hands-on experience with BGP security concepts.

Open-source network simulators and emulators in 2026

February 1, 2026 - Network Simulation

In this annual update of my list of open-source network simulators and emulators, I check each projects’s activity level, verify the well-maintained projects, identify new projects that deserve attention, and consider projects that may be fading away.