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

Editing protocol preferences

In Wireshark, you can modify most protocols by doing either of the following:

  • Right-clicking while on the IP header and selecting Protocol Preferences, where you will see a list of preferences
  • Going to Edit | Preferences | Protocols, and then selecting the appropriate protocol

Let's start with the protocol preferences for IPv4, as this is currently the most commonly used protocol on a LAN today.

Reviewing IPv4 preferences

To modify IPv4 preferences, you can use one of the methods listed previously, or you can right-click while on the header and select Protocol Preferences, and then select the Open Internet Protocol Version 4 preferences... shortcut, as shown here:

Figure 11.10 – IPv4 preference shortcut

Once you select the shortcut, a list of preferences will be listed, as shown in the following screenshot:

Figure 11.11 – IPv4 preferences

Once there, you can modify...