You're reading from Network Protocols for Security Professionals

Product type Book

Published in Oct 2022

Publisher Packt

ISBN-13 9781789953480

Pages 580 pages

Edition 1st Edition

Languages

Python

Concepts

Network Security

Authors (2):

Yoram Orzach

Deepanshu Khanna

View More author details

Table of Contents (23) Chapters

Preface

1. Part 1: Protecting the Network – Technologies, Protocols, Vulnerabilities, and Tools

2. Chapter 1: Data Centers and the Enterprise Network Architecture and its Components

3. Chapter 2: Network Protocol Structures and Operations

4. Chapter 3: Security Protocols and Their Implementation

5. Chapter 4: Using Network Security Tools, Scripts, and Code

6. Chapter 5: Finding Protocol Vulnerabilities

7. Part 2: Network, Network Devices, and Traffic Analysis-Based Attacks

8. Chapter 6: Finding Network-Based Attacks

9. Chapter 7: Detecting Device-Based Attacks

10. Chapter 8: Network Traffic Analysis and Eavesdropping

11. Chapter 9: Using Behavior Analysis and Anomaly Detection

12. Part 3: Network Protocols – How to Attack and How to Protect

13. Chapter 10: Discovering LAN, IP, and TCP/UDP-Based Attacks

14. Chapter 11: Implementing Wireless Network Security

15. Chapter 12: Attacking Routing Protocols

16. Chapter 13: DNS Security

17. Chapter 14: Securing Web and Email Services

18. Chapter 15: Enterprise Applications Security – Databases and Filesystems

19. Chapter 16: IP Telephony and Collaboration Services Security

20. Assessments

21. Index

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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...