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

Summary

Wireshark has a number of useful tools and graphs that help network administrators visualize what's happening on the network, at any given time, using a variety of methods. In this chapter, we began with an overview of various options in the Statistics menu, such as general information on the packet capture, protocol hierarchy, and the ability to assess the health of numerous protocols.

We then investigated I/O graphs and learned how to utilize different filters and expressions, create differently colored graphs, and view several graphs concurrently. Additionally, we evaluated the power of using a TCP stream graph. By using examples, we first evaluated a time sequence graph and compared the differences between a Stevens and a tcptrace graph. We then summarized by learning the value of determining throughput, assessing RTT, and monitoring window scaling.

In the next chapter, you will discover CloudShark (CS), an online packet analysis tool with which you can view...