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Learn Wireshark

Learn Wireshark

By : Lisa Bock
4.9 (7)
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Learn Wireshark

Learn Wireshark

4.9 (7)
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)
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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

Identifying why and how to add comments

When working with trace files, you might need to make a note on a single packet or the entire capture, for future reference.

Wireshark has options when working with comments. You can add comments to preserve the details of the entire capture or a single packet, as outlined next.

Providing file and packet comments

Within Wireshark, you can comment on the entire capture to document what you found within the file. You might preserve this information, either for yourself or to share with others when working with a team. Let's walk through an example of adding a comment using the Web Page.pcapng subset.

To add a comment to the file, you can do one of the following:

  • Select the comments icon in the lower left-hand corner, which looks like a pad and pencil.
  • Go to Statistics | Capture File Properties and include your comments in the space below Capture file comments.

For example, in my Web Page.pcapng file, I went...

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