Book Image

Cybersecurity – Attack and Defense Strategies - Second Edition

By : Yuri Diogenes, Dr. Erdal Ozkaya
Book Image

Cybersecurity – Attack and Defense Strategies - Second Edition

By: Yuri Diogenes, Dr. Erdal Ozkaya

Overview of this book

Cybersecurity – Attack and Defense Strategies, Second Edition is a completely revised new edition of the bestselling book, covering the very latest security threats and defense mechanisms including a detailed overview of Cloud Security Posture Management (CSPM) and an assessment of the current threat landscape, with additional focus on new IoT threats and cryptomining. Cybersecurity starts with the basics that organizations need to know to maintain a secure posture against outside threat and design a robust cybersecurity program. It takes you into the mindset of a Threat Actor to help you better understand the motivation and the steps of performing an actual attack – the Cybersecurity kill chain. You will gain hands-on experience in implementing cybersecurity using new techniques in reconnaissance and chasing a user’s identity that will enable you to discover how a system is compromised, and identify and then exploit the vulnerabilities in your own system. This book also focuses on defense strategies to enhance the security of a system. You will also discover in-depth tools, including Azure Sentinel, to ensure there are security controls in each network layer, and how to carry out the recovery process of a compromised system.
Table of Contents (20 chapters)
18
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19
Index

Firewall logs

The firewall log format varies according to the vendor; however, there are some core fields that will be there regardless of the platform. When reviewing the firewall logs, you must focus on primarily answering the following questions:

  • Who started the communication (source IP)?
  • Where is the destination of that communication (destination IP)?
  • What type of application is trying to reach the destination (transport protocol and port)?
  • Was the connection allowed or denied by the firewall?

The following code is an example of the Check Point firewall log; in this case, we are hiding the destination IP for privacy purposes:

"Date","Time","Action","FW.Name","Direction","Source","Destination","Bytes","Rules","Protocol" "
datetime=26Nov2017","21:27:02","action=drop","fw_name=Governo","dir=inboun d",&quot...