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

ICMP-based attacks, ping scans, the ping of death, and L3 DDoS

IP-based attacks are attacks that focus on layer 3, which is everything related to IP addresses. ARP-based attacks focus on a network device's ARP cache, usually to hijack end-to-end sessions by impersonating the addresses of the target of the attack. We talked about these two types of attacks in Chapter 6, Finding Network-Based Attacks, in the L3 and ARP-based attacks section.

In this section, we will talk about the following attacks:

  • Ping scans and layer 3 DDoS
  • The ping of death and malformed packets

Let's get to the details.

Ping scans and L3 DDoS

Ping scans can be used for two purposes:

  • For network discovery, to identify potential victims
  • As a DDoS attack, using ICMP packets to block a network or for loading network devices

A ping scan used for network discovery

For network scanning, we will simply see a scanning pattern from a single source. It will start...