Most topics in this book cover attack scenarios. Unfortunately, one day you might experience attempts against your own systems. This means your security defense measures will be challenged and hopefully you will have the right tools to identify and prevent the breach from causing damage to your organization.
We want to be clear that the Raspberry Pi is not the ideal tool to leverage for cyber defense. Best practice is layering security solutions that offer various features such as application layer controls, stateful firewall, intrusion prevention, access control, network segmentation, malware detection, network monitoring, data loss, and so on. Most tools that provide the level of protection you need to combat the threats seen on today's networks require very high power processing and tons of storage. Unfortunately, the Raspberry Pi does not offer this.
If you are looking to test some basic security concepts in a small lab such as segmentation using firewall features...
