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)

TCP port scanning

The following command is used for TCP port scanning. Using this command will send a TCP SYN packet to each port. The command will then wait for a SYN-ACK, RST, or ICMP error indicating an open port:

>>> res,unans = sr( IP(dst="target") /TCP(flags="S", dport=(1,1024)) )

VLAN hopping

Attacks associated with virtual LAN networks such as VLAN hopping becomes a simple task by just double layering the Dot1Q protocol first with the VLAN you're going to send on then the VLAN that you are going to. This is make networks using VLANs vulnerable to DDoS attacks methods and other attack vectors:

>>> sendp(Ether()/Dot1Q(vlan=2)/Dot1Q(vlan=7)/IP(dst=target)/ICMP())