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

HTTP is a rich protocol, and during a transaction, data will travel across several networks, along with encountering different clients and servers. As a result, there are numerous rules and variables. For this discussion, we focused on the key elements of an HTTP request-response session between a client and server.

We began by stepping through the key elements of a web page, and the role of the client and the server when retrieving data and objects. We reviewed the different HTTP versions, along with briefly touching on the available HTTP methods. We then moved on to learn about the different types of connections and how cookies help maintain state during a transaction. Finally, we summarized with a simple example of a complete HTTP conversation.

In the next chapter, we'll review Address Resolution Protocol (ARP) and begin with an overview of the role and purpose of this essential protocol. So that you understand how ARP works, we will cover an ARP transaction...