Book Image

Learn Wireshark, - Second Edition

By : Lisa Bock
5 (1)
Book Image

Learn Wireshark, - Second Edition

5 (1)
By: Lisa Bock

Overview of this book

Wireshark is a popular and powerful packet analysis tool that helps network administrators investigate latency issues and potential attacks. Over the years, there have been many enhancements to Wireshark’s functionality. This book will guide you through essential features so you can capture, display, and filter data with ease. In addition to this, you’ll gain valuable tips on lesser-known configuration options, which will allow you to complete your analysis in an environment customized to suit your needs. This updated second edition of Learn Wireshark starts by outlining the benefits of traffic analysis. You’ll discover the process of installing Wireshark and become more familiar with the interface. Next, you’ll focus on the Internet Suite and then explore deep packet analysis of common protocols such as DNS, DHCP, HTTP, and ARP. The book also guides you through working with the expert system to detect network latency issues, create I/O and stream graphs, subset traffic, and save and export captures. Finally, you’ll understand how to share captures using CloudShark, a browser-based solution for analyzing packet captures. By the end of this Wireshark book, you’ll have the skills and hands-on experience you need to conduct deep packet analysis of common protocols and network troubleshooting as well as identify security issues.
Table of Contents (28 chapters)
1
Part 1 Traffic Capture Overview
6
Part 2 Getting Started with Wireshark
11
Part 3 The Internet Suite TCP/IP
16
Part 4 Deep Packet Analysis of Common Protocols
21
Part 5 Working with Packet Captures

Chapter 18: Subsetting, Saving, and Exporting Captures

Not every packet capture is the perfect size or representative of the data you need to analyze. Whether you have captured the traffic yourself or someone has sent a file to you to examine, some packet captures are large and cumbersome. Many times, large files have to be subdivided into smaller files for effective analysis. In addition, when done, you will most likely need to save the file, or in some cases, export the capture into a specific format.

In this chapter, we'll cover several methods and techniques that we can use to work with packet captures. So that you can reduce a large file to a more manageable size, we'll look at filtering the capture to narrow down the results. You'll learn how versatile Wireshark is in exporting different components of a capture. Finally, you'll see how you can export files, along with specified packets, packet dissections, and objects. In addition, you'll discover...