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

Routers and routing protocols

In this section, we will examine routers, routing principles, and additional mechanisms such as Access Control Lists (ACLs), layer 3 switching, HSRP/VRRP, Network Address Translation (NAT), and more. In Chapter 12, Attacking Routing Protocols, we will take a deep dive into the details of routing protocols, their vulnerabilities, potential attacks, and how to defend against them.

Routing operations

Routing is the process of moving packets from end to end through the network. As you can see in Figure 2.20, the PC on the left, 10.1.1.20/24, sends the packet to its default gateway, R1, with an IP address of 10.1.1.1/24. R1 forwards the packet to the next router, R7, which then forwards it to R3, then to R4, and then to the destination of 20.1.1.20:

Figure 2.20 – ARP

There are several important issues regarding routing:

  • The device that sends the packet looks at the destination address, and since this address is...