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

Introducing Wireshark

Wireshark is one of the best cybersecurity tools used to monitor and secure networks.

This chapter aims to give you an overview of the tool and the main things that you can achieve with it. However, if you want to learn more about Wireshark, look at the book Learn Wireshark by Lisa Bock, also from Packt, which has more than 400 pages full of knowledge that will help you to become an expert with this tool.

The main characteristic of Wireshark is the ability to gather all network traffic passing through a given network adapter and decode the captured bits into a human-readable format. This is achieved by using decoders or dissectors that are constantly updated by the community.

Wireshark can be installed on any OS, but as you may know, it comes preinstalled on Kali Linux, so for this example we are going to use the version on Kali, which in our case is 3.2.7.

The very first step to start capturing our first packets will be to select the network card...