Book Image

Mastering Kali Linux for Advanced Penetration Testing - Third Edition

By : Vijay Kumar Velu, Robert Beggs
Book Image

Mastering Kali Linux for Advanced Penetration Testing - Third Edition

By: Vijay Kumar Velu, Robert Beggs

Overview of this book

This book takes you, as a tester or security practitioner, through the reconnaissance, vulnerability assessment, exploitation, privilege escalation, and post-exploitation activities used by pentesters. To start with, you'll use a laboratory environment to validate tools and techniques, along with an application that supports a collaborative approach for pentesting. You'll then progress to passive reconnaissance with open source intelligence and active reconnaissance of the external and internal infrastructure. You'll also focus on how to select, use, customize, and interpret the results from different vulnerability scanners, followed by examining specific routes to the target, which include bypassing physical security and the exfiltration of data using a variety of techniques. You'll discover concepts such as social engineering, attacking wireless networks, web services, and embedded devices. Once you are confident with these topics, you'll learn the practical aspects of attacking user client systems by backdooring with fileless techniques, followed by focusing on the most vulnerable part of the network – directly attacking the end user. By the end of this book, you'll have explored approaches for carrying out advanced pentesting in tightly secured environments, understood pentesting and hacking techniques employed on embedded peripheral devices.
Table of Contents (21 chapters)
Title Page
About Packt

Bypassing Network Access Control (NAC)

NAC works on a basic form of the 802.1X IEEE standard. The majority of corporations implement NAC to protect network nodes such as switches, routers, firewalls, servers, and, more importantly, endpoints. A decent NAC implies the controls that are put in place to prevent the intrusion by policies and also define who can access what. In this section, we will take a deep dive into different types of NAC that attackers or penetration testers encounter during an RTE or penetration test.


There are no specific common criteria or standardization for NAC; it depends on the vendor and the way it is implemented. For example, Cisco provides Cisco Network Admission Control and Microsoft provides Microsoft Network Access Protection. The primary purpose of NAC is to control the devices/elements, which can be connected and then made sure they are tested for compliance. NAC protections can be subdivided into two different categories:

  • Pre-admission NAC
  • Post-admission NAC...