Summary

We have started the continued journey into ICS cybersecurity, with a review of what was covered in the first edition of the book. Whereas the first edition was mainly concerned with establishing a secure ICS environment, this second edition will expand upon this with various topics that deal with maintaining a secure environment by observing and monitoring the security posture. I will be using a "from-the-ground-up" approach to explain all this, meaning we will look at security monitoring and the implementation aspects of it in all phases of the ICS environment life cycle. We start with a revised look at the ICS network architecture and the IDMZ in the next couple of chapters.

In the next chapter, we are going to take a fresh new look at the ICS network architecture. We will be reviewing the parts and pieces that make up a modern ICS network, stretched out over the three distinct parts of the ICS environment: the Enterprise Zone, the Industrial Zone, and the IDMZ.