How Does Firewalla Cyber Security Work? Firewalla's main packet processing engine has four different stages: Deep Insight: Make sense of all network traffic. Dig deep and understand what they are. Active Protect: Intrusion detection services to detect bad things and Intrusion prevention services to block before bad things happen. Behavior analytics: See things from a different angle. Control: This is where you tell us what to do. Applying sophisticated rules to control traffic flows.