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

Layer 4 TCP and UDP attacks

We talked about TCP and UDP in Chapter 2, Network Protocol Structures and Operations, in the L4 protocols: UDP, TCP, and QUIC section. In this section, we will drill down to protocol details and learn about potential attacks and how to protect against them.

We will learn about various types of scans – SYN scans, ACK scans, reset scans, Windows scan, and so on. We will mostly use the Nmap tool, available in the Command-line Interface (CLI) and graphical implementation for Windows and Linux.

UDP flooding attacks

As we saw in Chapter 2, Network Protocol Structures and Operations, in the L4 protocols: UDP, TCP, and QUIC section, UDP is quite a simple protocol, with a simple header – source port, destination port, message length, and message checksum.

As such, there are simple attacks that can be performed with UDP, with simple measures we can take against them. You can use several basic UDP attacks:

  • nmap -sU <target-device...