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

DNS protection

Protecting DNS nowadays is very important, as attacks on DNS services are very high. Even the National Security Agency (NSA) has realized that a misconfigured DNS service is very dangerous and can leave a door open for attackers, causing a potential loss of confidential information. So, the following are some implementations that can protect a DNS server from attacks:

  • Implement proper DNSSEC, which will help administrators to protect DNS servers against caching and poisoning attacks. For more information on the implementation, please follow this link: https://cloud.google.com/dns/docs/dnssec.
  • Limit the DNS server’s interactions to avoid DNS tunneling from the victim’s machine to an external network.
  • Log and monitor DNS’s malicious queries and responses, especially in the case of a newly built DNS end-to-end connection.
  • Harden DNS recursive servers, especially in domain caching.