Book Image

Learning Network Forensics

By : Samir Datt
Book Image

Learning Network Forensics

By: Samir Datt

Overview of this book

We live in a highly networked world. Every digital device—phone, tablet, or computer is connected to each other, in one way or another. In this new age of connected networks, there is network crime. Network forensics is the brave new frontier of digital investigation and information security professionals to extend their abilities to catch miscreants on the network. The book starts with an introduction to the world of network forensics and investigations. You will begin by getting an understanding of how to gather both physical and virtual evidence, intercepting and analyzing network data, wireless data packets, investigating intrusions, and so on. You will further explore the technology, tools, and investigating methods using malware forensics, network tunneling, and behaviors. By the end of the book, you will gain a complete understanding of how to successfully close a case.
Table of Contents (17 chapters)
Learning Network Forensics
About the Author
About the Reviewers

Capturing and analyzing wireless traffic

Before we go off to dive into the deep waters of the Wi-Fi sea, it is time to invite our good seafaring friend, Wireshark, to the scene. Just as we had used Wireshark to capture traffic on our wired Ethernet networks in the previous chapters, we will now use it to capture the Wi-Fi network traffic.

Sniffing challenges in a Wi-Fi world

Sniffing Wi-Fi traffic can be quite challenging. Wireless networks work on multiple channels and use different frequencies, even in the same location. The challenge is to select a specific static channel. The next challenge is identifying the channel number that we have decided to capture.

Another important factor to consider is the distance between the point of capture and the transmitting point. The greater the range, the less reliable the collection. Interference and collisions can also affect the quality of capture. As discussed earlier, certain network frequencies are subject to interference by devices such as cordless...