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

Following an HTTP stream

To get a solid understanding of what happens when requesting and receiving a web page, we'll step through the process by following an HTTP stream. We'll then further break down each of the elements when examining an HTTP transaction.

Note

Keep in mind that each HTTP session is different. This example will provide a sampling of what you can expect when viewing an HTTP conversation. In a true analysis exercise, you will most likely have to research the meaning of some of the various field values.

For this example, we'll use HTTP.pcap, as it is a complete conversation. To obtain a copy, go to https://www.cloudshark.org/captures/0012f52602a3, then download the file and open it in Wireshark. Once open, expand Frame 1 under the TCP header, where you will see the following:

[Conversation completeness: Complete, WITH_DATA (31)]

This is a small capture with only 40 packets, so it isn't difficult to see all elements of the complete...