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 2 – Setting up and a configuring a pfSense firewall

Even though a firewall is arguably not a passive security monitoring tool, the logs and events it generates do give us a passive view on what traverses the firewall (and hence traverses security boundaries). Firewall logs can give us detailed information on what is allowed or blocked at the network segment edges, and these should be included in a holistic security monitoring approach.

In this section, we will go over the ins and outs of deploying a software-based firewall—pfSense—and see how to configure it to start sending events such as blocked and allowed connections and other interesting information to a syslog (or SIEM) server.

I chose the pfSense software-based firewall because it is the most versatile, stable, expandable, and configurable firewall putting no money down will buy you. A pfSense VM is a convenient way to add a firewall, routing, network address translation (NAT), and event DPI...