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

The DNS protocol, behavior, and data structure

In this section, we will talk about DNS architecture in depth, the functioning of the DNS protocol, various types of DNS servers and services, and public and private DNS servers. So, let’s first understand what DNS is and how it works.

The DNS protocol

DNS is one of the most important and integral parts of network communications on the internet, which resolves domain names to IP addresses.

Let’s try to understand this with an example – consider the DNS protocol like a telephone directory where, against each name, there is a phone number and other details mapped. Similarly, in DNS, against each IP address, there is a domain name that is mapped, each mapping is called the DNS record, and the file that contains all the DNS resource records is known as the zone file.

Now, we know that the internet is huge, and hence maintaining a centralized record is nearly impossible. Therefore, these records are further...