Book Image

Mastering Kali Linux for Advanced Penetration Testing, Second Edition - Second Edition

By : Vijay Kumar Velu
Book Image

Mastering Kali Linux for Advanced Penetration Testing, Second Edition - Second Edition

By: Vijay Kumar Velu

Overview of this book

This book will take you, as a tester or security practitioner through the journey of reconnaissance, vulnerability assessment, exploitation, and post-exploitation activities used by penetration testers and hackers. We will start off by using a laboratory environment to validate tools and techniques, and using an application that supports a collaborative approach to penetration testing. Further we will get acquainted with passive reconnaissance with open source intelligence and active reconnaissance of the external and internal networks. We will also focus on how to select, use, customize, and interpret the results from a variety of different vulnerability scanners. Specific routes to the target will also be examined, including bypassing physical security and exfiltration of data using different techniques. You will also get to grips with concepts such as social engineering, attacking wireless networks, exploitation of web applications and remote access connections. Later you will learn the practical aspects of attacking user client systems by backdooring executable files. You will focus on the most vulnerable part of the network—directly and bypassing the controls, attacking the end user and maintaining persistence access through social media. You will also explore approaches to carrying out advanced penetration testing in tightly secured environments, and the book's hands-on approach will help you understand everything you need to know during a Red teaming exercise or penetration testing
Table of Contents (15 chapters)

Attacking an IPSec virtual private network

A virtual private network (VPN) uses the internet to provide secure (encrypted) communication between remote locations or users within the same network. There are two types of VPN: IPSec and SSL.

IPSec is the most commonly-used protocol to establish secure connections between networks and connect hosts in virtual private networks.

Within IPSec, there are several subsidiary protocols that perform specific functions, such as the following:

  • Authentication Header (AH): This provides proof-of-origin for IP packets, protecting them against replay attacks.
  • Encapsulation Security Protocol (ESP): This protocol provides the origin authenticity, integrity, and confidentiality of the transmitted data.
  • Security Association (SA): This is the set of algorithms used to encrypt and authenticate the transmitted data. Because SA is associated with data...