Tutorial 6: SSH Security Demonstration
Alright so you have logged into your Pi over the internet. I feel obligated, though, to show you just how unsafe that is. Yes, you could carry on your merry way and potentially never have a problem, but if I make you aware of just how easy it is to crack into the Pi like how you had set it up in the previous tutorial you might want to beef up security! After this demonstration I will show you how you can significantly beef up security so that you don't have to worry as much about the asshole hackers out there prowling the web.
This tutorial is a little older (published in 2014!). The main principles are still relevant, so I haven't needed to update this lesson.