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

Displaying filters

In this section, we'll go through display filters. And, in regards to display filters, we'll talk about how to sift through a large packet capture. So, a common method of capturing traffic is to not use the capture filter and instead capture everything that the interface can see, and then simply filter out exactly what you want to view because some of these other packets may be useful in diagnosing some sort of problem. We'll also go over quick access filter buttons. So, if there's a common thing that you need to filter on all the time in your environment, you can create a quick access button and simply click on that, and you don't have to type out the display filter every time. And there are a number of filter operators that you can use to combine multiple filters to create a full expression as to what you want to specifically filter on:

  • eq/==
  • le/<=
  • or/||
  • not/!
  • and/&&
  • ne/!=
  • gt/>
  • contains
  • It/<
  • matches
  • ge/>=
  • ()

So you could combine the IP address filter with a port...