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

Capturing filters

In this section, we'll take a look at how to filter traffic before it's captured with the BPF syntax. So, we'll filter that traffic on the capture interface.

In Wireshark, there are two places to enter a capture filter.

The first one is right on the following main screen. Right in the middle, we have the capture section, and it says, ...using this filter:Enter a capture filter. So, we can actually do that on the main screen. Try to enter a capture filter, then it will start capturing with that applied filter. You'll also see that there's a green bookmark icon, as shown in the following screenshot. If you hover over that icon, it says Manage saved bookmarks. And if we click on that, there's a number of saved bookmarks that are already built into Wireshark. So, if there's a common function that you want to filter on, it may already be in the list:

But you can also go up to the top and click on Manage Capture Filters. This gives you a list of all of your predefined capture filters...