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

SSL/TLS and proxies

Secured Socket Layer (SSL) and its successor, Transport Layer Security (TLS), are protocols that are used for encrypting the upper layer. These protocols work over TCP or UDP port 443 to access web pages by secured HTTP (HTTPS) over TCP port 443, and to access Google Drive with UDP port 443 using QUIC/GQUIC.

Protocol basics

SSL was first introduced by Netscape in 1994, to be standardized as TLSv1 in RFC 2246 (IETF, January 1999), TLSv1.1 in RFC 4346 (IETF, April 2006), TLSv1.2 (IETF, August 2008), and the latest version TLSv1.3 in RFC 8446 (IETF, August 2018).

The common use for TLS is to provide secure communication between a client and a server (the peers) while providing the following services:

  • Authentication: The server side is always authenticated; the client side is optionally authenticated.
  • Confidentiality: The data that's sent over the communication channel is encrypted and only visible to the two peers.
  • Integrity: Data that...