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Wireshark 2 Quick Start Guide
Wireshark 2 Quick Start Guide

Wireshark 2 Quick Start Guide: Secure your network through protocol analysis

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Wireshark 2 Quick Start Guide

Introduction to Wireshark and Packet Analysis

This chapter will help you to understand the basics and science behind packet analysis. Wireshark comes in very handy and proves something of a Swiss knife for professionals dealing with network, security, and digital forensic roles. You will learn about the following topics in this chapter:

  • Introduction to Wireshark
  • How Wireshark works
  • Capturing methodologies
  • Understanding the GUI of Wireshark
  • Starting our first capture

What is Wireshark?

Wireshark is a packet-sniffing application that is used by IT professionals for a diverse set of requirements (including forensics, troubleshooting, and enhancing network performance). You can download it for free from https://www.wireshark.org/download.html, where it is available for the majority of platforms, including Linux, Macintosh, and Windows.

Packet sniffing is also referred to as tapping into the wire, which basically involves reading pieces of information traveling in a communication channel. Considerations such as placement of sniffer, protocols to be analyzed, and communication channel type need to be assessed before capturing network packets.

How Wireshark works

Wireshark collects network traffic...

An introduction to packet analysis with Wireshark

Packet/traffic analysis deals with the study of network traffic, where the objective is to understand the structure, movement, and behavior of packets. Packet analysis is performed over live traffic or done over an already captured stream of traffic.

Numerous issues arise in day-to-day networking infrastructures, and if you are responsible for handling the network or security of your digital environment, you need to equip yourself with troubleshooting and analytical tools. Most of the issues escalate and are rectified at the packet level in networking. Issues arising at the packet level can gradually end up disrupting critical business communication, leading to loss of revenue. Even the best networking hardware utilizing the most advanced and secure set of protocols and services can go against you or behave abnormally. To perform...

Capturing methodologies

In order to capture the right set of a packets stream, you would need to know where to place your protocol analyser. Depending on the requirements (source of packets, number of packets, type of packets, and more), a protocol analyzer needs to be placed at a certain point in the network. Also, a few configuration changes in a network device may be necessary, such as switch configuration changes (mirroring is done in network switches to capture packets from one or more sources). The following sub sections discuss a few means of assessing the best way of configuring protocol analyses in certain types of topology.

Hub-based networks

It is relatively easy to sniff in a hub-based network topology...

Summary

This chapter laid the foundation of basic networking concepts and gave an introduction to the Wireshark GUI. Wireshark is a protocol analyzer that is used worldwide by IT professionals to capture and analyze network-level packets.

The Wireshark GUI is user-friendly, robust, and platform-independent; even new IT professionals can easily adopt the tool.

One important aspect of protocol analyzing is to place the sniffer at the right place; every organization's infrastructure is different, so we might need
to apply different techniques in order to get the right packets to use.

Hubbing out, port mirroring, ARP poisoning, and tapping are some of those useful techniques that can be used to monitor and analyze traffic in different situations.

There are six main parts in the Wireshark tool window: Menu Bar, Main Tool Bar, Packet List Pane, Packet Details Pane, Bytes Pane,...

Left arrow icon Right arrow icon

Key benefits

  • <ul><li>Learn protocol analysis, optimization and troubleshooting using Wireshark, an open source tool</li>
  • <li>Learn the usage of filtering and statistical tools to ease your troubleshooting job</li>
  • <li>Quickly perform root-cause analysis over your network in an event of network failure or a security breach</li>
  • </ul>

Description

<p>Wireshark is an open source protocol analyser, commonly used among the network and security professionals. Currently being developed and maintained by volunteer contributions of networking experts from all over the globe. Wireshark is mainly used to analyze network traffic, analyse network issues, analyse protocol behaviour, etc. - it lets you see what's going on in your network at a granular level. This book takes you from the basics of the Wireshark environment to detecting and resolving network anomalies.</p> <p>This book will start from the basics of setting up your Wireshark environment and will walk you through the fundamentals of networking and packet analysis. As you make your way through the chapters, you will discover different ways to analyse network traffic through creation and usage of filters and statistical features. You will look at network security packet analysis, command-line utilities, and other advanced tools that will come in handy when working with day-to-day network operations.</p> <p>By the end of this book, you have enough skill with Wireshark 2 to overcome real-world network challenges.</p>

Who is this book for?

<p>If you are a security professional or a network enthusiast who is interested in understanding the internal working of networks and packets, then this book is for you. No prior knowledge of Wireshark is needed.</p>

What you will learn

  • <ul><li>Learn how TCP/IP works </li>
  • <li>Install Wireshark and understand its GUI</li>
  • <li>Creation and Usage of Filters to ease analysis process</li>
  • <li>Understand the usual and unusual behaviour of Protocols</li>
  • <li>Troubleshoot network anomalies quickly with help of Wireshark</li>
  • <li>Use Wireshark as a diagnostic tool for network security analysis to identify source of malware</li>
  • <li>Decrypting wireless traffic</li>
  • <li>Resolve latencies and bottleneck issues in the network</li>
  • </ul>

Product Details

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Publication date, Length, Edition, Language, ISBN-13
Publication date : Jun 27, 2018
Length: 164 pages
Edition : 1st
Language : English
ISBN-13 : 9781789342789
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Product Details

Publication date : Jun 27, 2018
Length: 164 pages
Edition : 1st
Language : English
ISBN-13 : 9781789342789
Languages :
Tools :

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Table of Contents

9 Chapters
Installing Wireshark Chevron down icon Chevron up icon
Introduction to Wireshark and Packet Analysis Chevron down icon Chevron up icon
Filtering Our Way in Wireshark Chevron down icon Chevron up icon
Analyzing Application Layer Protocols Chevron down icon Chevron up icon
Analyzing the Transport Layer Protocols TCP/UDP Chevron down icon Chevron up icon
Network Security Packet Analysis Chevron down icon Chevron up icon
Analyzing Traffic in Thin Air Chevron down icon Chevron up icon
Mastering the Advanced Features of Wireshark Chevron down icon Chevron up icon
Other Books You May Enjoy Chevron down icon Chevron up icon

Customer reviews

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(1 Ratings)
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1 star 0%
James Aug 28, 2020
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Easy to follow along, the book is written for an earlier version of Wireshark though! Should be updated to the current version!
Amazon Verified review Amazon
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