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

Establishing a baseline

Establishing a baseline is a task you must perform. It might sound difficult, but it's very simple when you know your network. In this section, we will talk about the common protocols that run in a typical enterprise network, and we will look at their typical traffic patterns.

Protocols that are common to enterprise networks can be categorized into several groups, as follows:

  • Internet access protocols—HTTP, HTTP Secure (HTTPS), Google QUIC (GQUIC), SMTP, POP, and DNS
  • Organizational applications—NetBIOS/SMB, Microsoft Terminal Services (MS-TS), database applications, and multicasts
  • Network protocols—Routing protocols, discovery protocols, monitoring protocols, and so on

Let's see some typical capture files and find out what we should see in organizational networks.

Small business/home network

In the following screenshot, we see a typical protocol hierarchy of a user connected to an organizational...