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 options to save a file

Whenever you run and then stop a capture, Wireshark will hold the capture in a temporary file. Wireshark will display the temporary filename in the Status bar, which is found on the lower left-hand side of the interface. In addition, along the top, you will see the name of the interface used in the capture and an asterisk, as shown in the following screenshot:

Figure 18.13 – Temporary file in Wireshark

At some point, you will most likely want to save the file. To save the file, go to the File menu choice and then click on Save. Once you save the file, the filename will appear along the top of the Wireshark interface, as shown in the following screenshot:

Figure 18.14 – File saved in Wireshark

When you do go to File and then Save, you will find that Wireshark will allow you to save the capture file in many different formats, as discussed next.

Using Save as

The File menu choice...