Book Image

Applied Network Security

By : Arthur Salmon, Michael McLafferty, Warun Levesque
Book Image

Applied Network Security

By: Arthur Salmon, Michael McLafferty, Warun Levesque

Overview of this book

Computer networks are increasing at an exponential rate and the most challenging factor organisations are currently facing is network security. Breaching a network is not considered an ingenious effort anymore, so it is very important to gain expertise in securing your network. The book begins by showing you how to identify malicious network behaviour and improve your wireless security. We will teach you what network sniffing is, the various tools associated with it, and how to scan for vulnerable wireless networks. Then we’ll show you how attackers hide the payloads and bypass the victim’s antivirus. Furthermore, we’ll teach you how to spoof IP / MAC address and perform an SQL injection attack and prevent it on your website. We will create an evil twin and demonstrate how to intercept network traffic. Later, you will get familiar with Shodan and Intrusion Detection and will explore the features and tools associated with it. Toward the end, we cover tools such as Yardstick, Ubertooth, Wifi Pineapple, and Alfa used for wireless penetration testing and auditing. This book will show the tools and platform to ethically hack your own network whether it is for your business or for your personal home Wi-Fi.
Table of Contents (18 chapters)

Creating our first packet

So, let's go ahead and look at our first packet. I'm going to go ahead and create one with a payload with a message MyFirstPacket embeded inside an ICMP packet. Then I will use Wireshark to show you the packet breakdown and details of how I did it.

The breakdown is as follows:

  • p: This is the name of the packet
  • IP(): This is the type of packet you want to create, in this case an IP packet
  • (dst=""): This is the destination to send the packet to (in this case my router)
  • /ICMP(): If you want to create an ICMP packet with the default values provided by scapy
  • /"MyFirstPacket"): The payload to include which you don't have to provide in order for it to work

Sending and receiving

Scapy provides us with...