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

Understanding coloring rules

Built within Wireshark are coloring rules or filters, which identify or highlight specific traffic. Locate the default coloring rules by going to the menu and choosing View | Coloring Rules, as shown in the following screenshot:

Figure 17.5 – Default coloring rules

Once you are in the Coloring Rules menu, you can edit, delete, or add your own as needed. In addition to using the default coloring rules, you can create and share rules. An example can be found at https://wiki.wireshark.org/Jay%27s_Coloring_Rules.

Each rule is processed until Wireshark finds a match, according to the order shown in the console. To modify the order of a particular rule, select the rule and then drag it to the desired position.

A checkmark on the left-hand side indicates an active rule. To deactivate it, deselect the rule you do not want Wireshark to consider.

To edit a rule, do the following:

  1. Select and double-click the coloring...