Book Image

Mastering Wireshark 2

By : Andrew Crouthamel
Book Image

Mastering Wireshark 2

By: Andrew Crouthamel

Overview of this book

Wireshark, a combination of a Linux distro (Kali) and an open source security framework (Metasploit), is a popular and powerful tool. Wireshark is mainly used to analyze the bits and bytes that flow through a network. It efficiently deals with the second to the seventh layer of network protocols, and the analysis made is presented in a form that can be easily read by people. Mastering Wireshark 2 helps you gain expertise in securing your network. We start with installing and setting up Wireshark2.0, and then explore its interface in order to understand all of its functionalities. As you progress through the chapters, you will discover different ways to create, use, capture, and display filters. By halfway through the book, you will have mastered Wireshark features, analyzed different layers of the network protocol, and searched for anomalies. You’ll learn about plugins and APIs in depth. Finally, the book focuses on pocket analysis for security tasks, command-line utilities, and tools that manage trace files. By the end of the book, you'll have learned how to use Wireshark for network security analysis and configured it for troubleshooting purposes.
Table of Contents (18 chapters)
Title Page
Copyright and Credits
Packt Upsell
Free Chapter
Installing Wireshark 2

Advanced filtering

We'll go over how to filter traffic in data fields within packets, how to create columns on specific fields in our data packets and to sort them, and filter with these more hidden methods that you may not have noticed yet.

We'll go to our packet capture, opening up And what we'll do is expand the section that gives us the details of our packet. We'll scroll down and find a packet that we wish to investigate a bit more.

What we can do is expand the sections, which will allow us to easily view the different fields of data within the different layers of the packet. So, if you're familiar with the OSI layers that we use in networking, then this'll look familiar to you. So, we have our layer 2 information with our frame and Ethernet, layer 3 with IPv4, layer 4 with TCP, and so on.

So, let's click on TCP to expand this, and we'll go down to Window size value. Now, the window size is an important field that we'll get into in more detail later on, but what...