Book Image

Industrial Cybersecurity - Second Edition

By : Pascal Ackerman
Book Image

Industrial Cybersecurity - Second Edition

By: Pascal Ackerman

Overview of this book

With Industrial Control Systems (ICS) expanding into traditional IT space and even into the cloud, the attack surface of ICS environments has increased significantly, making it crucial to recognize your ICS vulnerabilities and implement advanced techniques for monitoring and defending against rapidly evolving cyber threats to critical infrastructure. This second edition covers the updated Industrial Demilitarized Zone (IDMZ) architecture and shows you how to implement, verify, and monitor a holistic security program for your ICS environment. You'll begin by learning how to design security-oriented architecture that allows you to implement the tools, techniques, and activities covered in this book effectively and easily. You'll get to grips with the monitoring, tracking, and trending (visualizing) and procedures of ICS cybersecurity risks as well as understand the overall security program and posture/hygiene of the ICS environment. The book then introduces you to threat hunting principles, tools, and techniques to help you identify malicious activity successfully. Finally, you'll work with incident response and incident recovery tools and techniques in an ICS environment. By the end of this book, you'll have gained a solid understanding of industrial cybersecurity monitoring, assessments, incident response activities, as well as threat hunting.
Table of Contents (26 chapters)
Section 1: ICS Cybersecurity Fundamentals
Section 2:Industrial Cybersecurity – Security Monitoring
Section 3:Industrial Cybersecurity – Threat Hunting
Section 4:Industrial Cybersecurity – Security Assessments and Intel
Chapter 15: Industrial Control System Risk Assessments
Section 5:Industrial Cybersecurity – Incident Response for the ICS Environment

Exercise 3 – Adding a Snort IDS to pfSense

Earlier, we discussed having Snort as part of the Security Onion appliance, functioning as an IDS for the internal network. We will now install Snort as a package add-on to the pfSense firewall, with the aim of adding intrusion prevention system (IPS) functionality on the edge of our network. The emphasis is on prevention here, not detection. We want the firewall to be able to stop attacks aimed at our network from the outside or discovered leaving our network from the inside. Industrial environments typically want to stay away from active controls on the internal (industrial) network, as those active controls could interrupt legitimate processes and therefore cause downtime to production.

Having active controls between an untrusted zone (the enterprise or the Industrial Demilitarized Zone (IDMZ) and a trusted zone (the industrial network) adds more benefits than risk, however. Production processes should not rely on business or...