Book Image

Mastering Defensive Security

By : Cesar Bravo
Book Image

Mastering Defensive Security

By: Cesar Bravo

Overview of this book

Every organization has its own data and digital assets that need to be protected against an ever-growing threat landscape that compromises the availability, integrity, and confidentiality of crucial data. Therefore, it is important to train professionals in the latest defensive security skills and tools to secure them. Mastering Defensive Security provides you with in-depth knowledge of the latest cybersecurity threats along with the best tools and techniques needed to keep your infrastructure secure. The book begins by establishing a strong foundation of cybersecurity concepts and advances to explore the latest security technologies such as Wireshark, Damn Vulnerable Web App (DVWA), Burp Suite, OpenVAS, and Nmap, hardware threats such as a weaponized Raspberry Pi, and hardening techniques for Unix, Windows, web applications, and cloud infrastructures. As you make progress through the chapters, you'll get to grips with several advanced techniques such as malware analysis, security automation, computer forensics, and vulnerability assessment, which will help you to leverage pentesting for security. By the end of this book, you'll have become familiar with creating your own defensive security tools using IoT devices and developed advanced defensive security skills.
Table of Contents (23 chapters)
Section 1: Mastering Defensive Security Concepts
Section 2: Applying Defensive Security
Section 3: Deep Dive into Defensive Security

Chapter 7: Hardening a Unix Server

"A hardened server drastically reduces the attack surface area, therefore minimizing exposure to threats. It helps to get rid of weaker default settings and to meet compliance."

– Faraz Ahmad, IT security consultant

If you are used to managing Windows systems and servers, then managing Unix-based systems and servers may become a very complex task. But don't worry, we have your back, and we will start from the basics so that you can easily follow this chapter.

Here, we will be covering the commands used in most Unix-based systems (including Linux). Despite the fact that there might be some differences between Unix systems, the structures and examples in this chapter should apply to the most common Unix systems (including Linux).

In this chapter, we are going to cover the following main topics:

  • A complete guide to Unix services (how they work and how to manage them)
  • How permissions work on Unix systems...