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

Discovering tunneling protocols

Some organizations have decided to make the switch to a dedicated IPv6 networked environment. However, many are running a dual-stack environment, where hosts that are using both IPv4 and IPv6 must be able to communicate with one another.

As evidenced, an IPv4 header is completely different to an IPv6 header. In order to have traffic pass from an IPv4 network through an IPv6 network and vice versa, the traffic must use a tunneling protocol. A discussion of the various ways to transport an IPv6 packet through an IPv4 network is outlined in RFC 7059, found at https://tools.ietf.org/html/rfc7059. The following diagram shows the proper format for encapsulation of an IPv6 packet within an IPv4 packet:

Figure 11.13 – Encapsulation of an IPv6 packet within an IPv4 packet

Some of the tunneling protocols that enable an IPv6 packet to travel over an IPv4 network include the following:

  • Intra-Site Automatic Tunnel Addressing...