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

Adding comments

While conducting packet analysis, there may be issues that you will want to highlight and identify so that you can reference them at a later date. For example, you might want to make a note on a single packet or an entire capture for future reference.

All of this is possible in Wireshark, as you can write a note in the capture outlining the key issues that were found. Once documented, you or your team can reference the comments at a later date.

Note

While commenting is optional, it is always good practice to document to help preserve the details of your findings.

Let's start with how we can add file comments.

Attaching comments to files

Adding a comment to a packet capture is a very handy tool. When adding a comment, you can view it later to refresh your memory on key issues related to that packet capture. For example, you may have identified possible illegal or malicious activity, such as cryptocurrency mining, and you can list the details right...