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)
Part 1: Protecting the Network – Technologies, Protocols, Vulnerabilities, and Tools
Part 2: Network, Network Devices, and Traffic Analysis-Based Attacks
Part 3: Network Protocols – How to Attack and How to Protect

Fuzzing tools

When testing network protocols and devices security, fuzzing can be used for several purposes:

  • Breaking usernames and passwords (brute-force attacks)
  • Crashing the target device or some of its functionality
  • Manipulating communication processes running on the device

Let's dive into the details.

Basic fuzzing

Basic fuzzing can be just to send data to a device and see what happens. There are several options for this.


For Windows/Linux, you can use NMAP features, such as IP address scanning, TCP port scanning, and various scripting tools. NMAP for Windows was covered in the Information gathering and packet analysis tools section in Chapter 4, Using Network Security Tools, Scripts, and Code.


For Linux, you can use simple tools such as Netcat. In the following example, you can see a Netcat script that generates random traffic and is sent to <target-host> <target-port>:

while [ 1 ]; do cat /dev/urandom...