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

Attacks on a service – domain spoofing and hijacking, or cache poisoning

Domain spoofing, generally known as DNS spoofing and also called DNS cache poisoning, is a technique in which attackers alter DNS records to redirect network traffic to a malicious phishing website that looks like an original website, to grab credentials, confidential data, and so on.

So, how does a DNS spoofing attack work in a real-world environment? Let’s understand the basics of this attack with a simple diagram, as shown in the following figure:

Figure 13.18 – DNS spoofing

Let’s elaborate on the preceding figure, as follows:

  1. An attacker injects a fake or malicious website DNS entry into the DNS server.
  2. The victim opens the original website (domain).
  3. The DNS resolver checks the domain name in its cache and resolves it in the fake DNS entry.
  4. Once the domain is resolved, the victim will be redirected to the fake malicious domain.
  5. ...