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- Herausgeber: Packt Publishing
- Kategorie: Wissenschaft und neue Technologien
- Sprache: Englisch
Protect your network as you move from the basics of the Wireshark scenarios to detecting and resolving network anomalies.
Key Features
- Learn protocol analysis, optimization and troubleshooting using Wireshark, an open source tool
- Learn the usage of filtering and statistical tools to ease your troubleshooting job
- Quickly perform root-cause analysis over your network in an event of network failure or a security breach
Book Description
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.
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.
By the end of this book, you have enough skill with Wireshark 2 to overcome real-world network challenges.
What you will learn
- Learn how TCP/IP works
- Install Wireshark and understand its GUI
- Creation and Usage of Filters to ease analysis process
- Understand the usual and unusual behaviour of Protocols
- Troubleshoot network anomalies quickly with help of Wireshark
- Use Wireshark as a diagnostic tool for network security analysis to identify source of malware
- Decrypting wireless traffic
- Resolve latencies and bottleneck issues in the network
Who this book is for
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.
Das E-Book können Sie in Legimi-Apps oder einer beliebigen App lesen, die das folgende Format unterstützen:
Seitenzahl: 130
Veröffentlichungsjahr: 2018
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Wireshark 2 Quick Start Guide
Copyright © 2018 Packt Publishing
All rights reserved. No part of this book may be reproduced, stored in a retrieval system, or transmitted in any form or by any means, without the prior written permission of the publisher, except in the case of brief quotations embedded in critical articles or reviews.
Every effort has been made in the preparation of this book to ensure the accuracy of the information presented. However, the information contained in this book is sold without warranty, either express or implied. Neither the author, nor Packt Publishing or its dealers and distributors, will be held liable for any damages caused or alleged to have been caused directly or indirectly by this book.
Packt Publishing has endeavored to provide trademark information about all of the companies and products mentioned in this book by the appropriate use of capitals. However, Packt Publishing cannot guarantee the accuracy of this information.
Commissioning Editor:Vijin BorichaAcquisition Editor: Reshma RamanContent Development Editor: Aditi GourTechnical Editor: Shweta JadhavCopy Editor: Safis EditingProject Coordinator: Hardik BhindeProofreader: Safis EditingIndexer: Aishwarya GangawaneGraphics: Jason MonteiroProduction Coordinator: Deepika Naik
First published: June 2018
Production reference: 1200618
Published by Packt Publishing Ltd. Livery Place 35 Livery Street Birmingham B3 2PB, UK.
ISBN 978-1-78934-278-9
www.packtpub.com
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Contributors
About the author
Charit Mishra is an ICS/SCADA professional, working as a security architect for critical infrastructure across several industries, including oil and gas, mining, utilities, renewable energy, transportation, and telecom. He has been involved in leading and executing complex projects involving the extensive application of security standards, frameworks, and technologies. A postgraduate in computer science, Charit's profile boasts of leading industry certifications such as OSCP, CEH, CompTIA Security+, and CCNA R&S. Moreover, he regularly delivers professional training and knowledge sessions on critical infrastructure security internationally.
About the reviewer
Anish has a YouTube channel named Zariga Tongy where he loves to post videos on security, hacking and other cloud related technology.
Packt is searching for authors like you
If you're interested in becoming an author for Packt, please visit authors.packtpub.com and apply today. We have worked with thousands of developers and tech professionals, just like you, to help them share their insight with the global tech community. You can make a general application, apply for a specific hot topic that we are recruiting an author for, or submit your own idea.
Table of Contents
Title Page
Copyright and Credits
Wireshark 2 Quick Start Guide
Packt Upsell
Why subscribe?
PacktPub.com
Contributors
About the author
About the reviewer
Packt is searching for authors like you
Preface
Who this book is for
What this book covers
To get the most out of this book
Download the color images
Conventions used
Get in touch
Reviews
Installing Wireshark
Introduction to Wireshark
Why use Wireshark?
The installation process
Troubleshooting common installation errors
A brief overview of the TCP/IP model
The layers in the TCP/IP model
Summary
Introduction to Wireshark and Packet Analysis
What is Wireshark?
How Wireshark works
An introduction to packet analysis with Wireshark
How to do packet analysis
Capturing methodologies
Hub-based networks
The switched environment
ARP poisoning
Passing through routers
The Wireshark GUI
Starting our first capture
Summary
Filtering Our Way in Wireshark
Introducing filters
Capture filters
Why use capture filters
How to use capture filters
An example capture filter
Display filters
Retaining filters for later use
Searching for packets using the Find dialog
Colorize traffic
Create new Wireshark profiles
Summary
Analyzing Application Layer Protocols
Domain Name System (DNS)
Dissecting a DNS packet
Dissecting DNS query/response
File transfer protocol
Dissecting FTP communication packets
Hypertext Transfer Protocol (HTTP)
How request/response works
Request
Response
Simple Mail Transfer Protocol (SMTP)
Dissecting SMTP communication packets
Session Initiation Protocol (SIP) and Voice Over Internet Protocol(VOIP)
Reassembling packets for playback
Decrypting encrypted traffic (SSL/TLS)
Summary
Analyzing the Transport Layer Protocols TCP/UDP
The transmission control protocol
Understanding the TCP header and its various flags
How TCP communicates
How it works
How sequence numbers are generated and managed
RST (reset) packets
Unusual TCP traffic
The User Datagram Protocol
The UDP header
How it works
The DHCP
The TFTP
Unusual UDP traffic
Summary
Network Security Packet Analysis
Information gathering
PING sweep
Half-open scan (SYN)
OS fingerprinting
ARP poisoning
Analysing brute force attacks
Inspecting malicious traffic (malware)
Summary
Analyzing Traffic in Thin Air
Understanding IEEE 802.11
Various modes in wireless communications
Usual and unusual wireless traffic
WPA Enterprise
Decrypting wireless network traffic
Summary
Mastering the Advanced Features of Wireshark
The Statistics menu
Using the Statistics menu
Protocol Hierarchy
Conversations
Endpoints
Follow TCP Streams
Command line-fu
Summary
Other Books You May Enjoy
Leave a review - let other readers know what you think
Preface
Wireshark is the world's most popular free and open source protocol analyzer, and it is commonly used by networking and security professionals for troubleshooting, analysis, protocol development, and forensics. The primary objective of Wireshark is to capture network traffic and display the packet data in, as detailed a way as possible. It helps professionals view the content of network traffic on a microscopic level.
This book is written from the standpoint of using Wireshark and learning how network protocols function and provides a practical approach to conducting protocol analysis,troubleshooting network anomalies, and examining security issues. I have tried to depict common scenarios that you may come across in day-to-day operations through practical demonstration wherever possible to help you understandthe concepts better.By reading this book, you will learn how to install Wireshark, work with Wireshark GUI elements, and learn some advanced features behind the scenes, such as the filtering options, the statistics menu, and decrypting wireless and encrypting traffic. You can bethe superhero of your team who helps resolve connectivity issues, network administration tasks, and computer forensics because Packets Are Life. If your routine job requiresdealing with computer networks and security, then this book will give you a strong head start.Happy sniffing!
Who this book is for
This book is for students/professionals who have basic experience and knowledge of the networking and who want to get up to speed with Wireshark in no time. This book will take you from the installation to the usage of commonly used tools/tricks. The book will get you comfortable with the GUI elements of Wireshark and explain the fundamentals of the science behind protocol analysis.
What this book covers
Chapter 1, Installing Wireshark, will provide you with an introduction to the basics of the TCP/IP model and a step-by-step walk-through of the installation of Wireshark on your favorite operating system.
Chapter 2, Introduction to Wireshark and Packet Analysis, will help you understand the basics and science behind packet analysis, as Wireshark come in handy and proves to be a Swiss Army knife for professionals dealing with network, security, and digital forensics. In this chapter, you will also understand the trick of placing the sniffer in a strategic location to get most out of your network.
Chapter 3, Filtering Our Way in Wireshark, will help you identify and apply the Wireshark filters, namely the capturing and displaying filters. Filtering provides a powerful way to capture or see the traffic you desire; it's an effective way to remove the noise from the stream of packets we desire to analyze.
Chapter 4, Analyzing Application Layer Protocols, will help you understand the approach and methodology for analyzing application layer protocols such as HTTP, SMTP, FTP, and DNS through Wireshark. As we know, application layer protocols typically interface between a client and a server. It is critical to understand the structure and behavior of application layer protocols packets in order to identify anomalies with efficiency.
Chapter 5, Analyzing the Transport Layer Protocols TCP/UDP, will help you understand the underlying network technology, enabling the movement of network packets across routing infrastructures through the analysis of transport layer protocols such as TCP and UDP. TCP and UDP are the basis of networking protocol, and it is important to understand their structure and behavior.
Chapter 6, Network Security Packet Analysis, will guide you through using Wireshark to analyze security issues, such as analyzing malware traffic and footprinting attempts in your network.
Chapter 7, Analyzing Traffic in Thin Air, will help you in understand the methodology and approach involved in performing wireless packet analysis. This chapter shows you how to analyze wireless traffic and pinpoint any problems that may follow. We will also learn the cool trick of decrypting wireless traffic using Wireshark.
Chapter 8, Mastering the Advanced Features of Wireshark, will provide you with insight into the advanced options and elements available in Wireshark, such as a statistics menu, and will also provide a brief and summarized approach on how to work with command-line packet sniffing applications, such as Tshark.
To get the most out of this book
Basic understanding of networking protocols, OSI and TCP/IP model
A computer system with a basic internet connection to follow the depicted scenarios
Download the color images
We also provide a PDF file that has color images of the screenshots/diagrams used in this book. You can download it here: https://www.packtpub.com/sites/default/files/downloads/Wireshark2QuickStartGuide_ColorImages.pdf.
Conventions used
There are a number of text conventions used throughout this book.
CodeInText: Indicates code words in text, database table names, folder names, filenames, file extensions, pathnames, dummy URLs, user input, and Twitter handles. Here is an example: "Mount the downloaded WebStorm-10*.dmg disk image file as another disk in your system."
Bold: Indicates a new term, an important word, or words that you see onscreen. For example, words in menus or dialog boxes appear in the text like this. Here is an example: "Select System info from the Administration panel."
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Reviews
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Installing Wireshark
This chapter provides you with an introduction to the basics of the TCP/IP model and a step-by-step walkthrough of how to install Wireshark on your favorite operating system. You will be introduced to the following topics:
What is Wireshark?
A brief overview of the TCP/IP model
Installing and running Wireshark on different platforms
Troubleshooting common installation errors
Introduction to Wireshark
Wireshark is an advanced network and protocol analyser, it lets you visualize network's activity in graphical form, and assists professionals in debugging network-level issues. Wireshark enhances the ability of network and security professionals by providing detailed insight into the network traffic. However, Wireshark is also used by malicious users to sniff network traffic in order to obtain sensitive data in the form of plain text.
Why use Wireshark?
Many people, including myself, are obsessed with the simplicity of the packet-capturing features that Wireshark provides us with. Let's quickly go through a few of the reasons why most professionals prefer Wireshark to other packet sniffers:
User friendly
: The interface of Wireshark is easy to use and understand, tools & features are very well organized and represented.
Robustness
: Wireshark is capable of handling enormous volumes of network traffic with ease.
Platform independent
: Wireshark is available for different flavors of operating system, whether Windows, Linux, and Macintosh.
Filters
: There are two kinds of filtering options available in Wireshark:
You choose what to capture (
capture filters
)
You choose what to display after you've captured (
display filters
)
Cost
: Wireshark is a free and open source packet analyzer that is developed and maintained by a dedicated community of professionals. Wireshark also offers a few paid professional applications as well. For more details, refer to Wireshark's official website
https://www.wireshark.org/
.
Support
: Wireshark is being continuously developed by a group of contributors that are scattered around the globe. We can sign up to Wireshark's mailing list or we can get help from the online documentation, which can be accessed through the GUI itself. Various other online forums are also available for you to get the most effective help; go to Google Paid Wireshark Support to learn more about the available support.
