Book Image

Network Protocols for Security Professionals

By : Yoram Orzach, Deepanshu Khanna
5 (1)
Book Image

Network Protocols for Security Professionals

5 (1)
By: Yoram Orzach, Deepanshu Khanna

Overview of this book

With the increased demand for computer systems and the ever-evolving internet, network security now plays an even bigger role in securing IT infrastructures against attacks. Equipped with the knowledge of how to find vulnerabilities and infiltrate organizations through their networks, you’ll be able to think like a hacker and safeguard your organization’s network and networking devices. Network Protocols for Security Professionals will show you how. This comprehensive guide gradually increases in complexity, taking you from the basics to advanced concepts. Starting with the structure of data network protocols, devices, and breaches, you’ll become familiar with attacking tools and scripts that take advantage of these breaches. Once you’ve covered the basics, you’ll learn about attacks that target networks and network devices. Your learning journey will get more exciting as you perform eavesdropping, learn data analysis, and use behavior analysis for network forensics. As you progress, you’ll develop a thorough understanding of network protocols and how to use methods and tools you learned in the previous parts to attack and protect these protocols. By the end of this network security book, you’ll be well versed in network protocol security and security countermeasures to protect network protocols.
Table of Contents (23 chapters)
1
Part 1: Protecting the Network – Technologies, Protocols, Vulnerabilities, and Tools
7
Part 2: Network, Network Devices, and Traffic Analysis-Based Attacks
12
Part 3: Network Protocols – How to Attack and How to Protect

L3- and ARP-based attacks

In this section, we will discuss ARP and IP attacks. Let's start with ARP poisoning, which is also known as ARP spoofing.

ARP poisoning

ARP is a protocol that resolves the destination MAC address from the destination IP address. Note that we discussed this in Chapter 2, Network Protocol Structures and Operations.

ARP poisoning (also known as ARP spoofing) is a type of attack that involves sending malicious ARP packets to a default gateway on a LAN in order to change the gateway ARP table.

The attack is used to alter the host-under-attack MAC address in the gateway ARP cache. This is so that instead of sending packets to the host under attack, the gateway will send these packets to the attacker that can copy their content.

Once the default gateway has changed its ARP cache with the faulty MAC entry, all of the traffic sent to the host under attack travels through the attacker's computer, allowing the attacker to inspect or modify it...