Last summer in Berlin, I found myself sitting in a bustling café, browsing the internet on my laptop. Suddenly, I received a frantic message from a friend: "Someone hacked my bank account!" The color drained from my face as I realized this could happen to anyone—and indeed had happened to several people I knew. It was in that moment, as I watched unsuspecting patrons sipping their coffee, that I felt a compelling urge to dive deeper into firewall security. How could I protect myself, my data, and perhaps even my friends from such threats in an increasingly interconnected world?