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

Email protocols and loopholes

Email, short for electronic mail, is used to send and receive messages in electronic form. To send or receive emails, there are three main protocols:

  • Post Office Protocol (POP(3))
  • Internet Message Access Protocol (IMAP(4))
  • Simple Mail Transfer Protocol (SMTP)

All of these protocols are used to send and receive emails, but all of them are different from each other. So, let’s understand the key differences between these three email protocols:

  • POP(3): The current version of POP is 3; hence, it is written sometimes as POP3 or POP(3). The major difference between POP(3) and IMAP and SMTP is that after sending or receiving emails from the server, it creates a local copy of the complete mail in the client’s machine and then deletes the email copy from the exchange server. Optionally, you can configure not to delete the email once downloaded. POP(3) uses port numbers 110 or 995 (SSL/TLS).
  • IMAP(4): The current version...