Port Knocking (Network Security Technique) Explained and Demoed in 5 Minutes!

Remember the secret knock you used to have to determine if someone was allowed into your treehouse as a kid? 👊

There is a digital equivalent called "port knocking" in which a secret sequence of connection requests is used to open up firewall access. 🧱

I just released a quick (<5 min) video in which I explain how it works and provide a working demo!