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)

Lab 2-create the following snort.conf and icmp.rules files

In this lab, you will create and setup configuration and rules files for Snort. These files determine how Snort will operate. After these files are in place Snort will be able to fully protect your system:

  1. Open the configuration file of Snort in a Terminal session type the following command:
      # leafpad /etc/snort/snort.conf
  1. Check the configuration file and determine if the ICMP rules are included or not. If not, include the following line:
      include /etc/snort/rules/icmp.rules
  1. Open the ICMP rules file and include the rule shown following:
      # leafpad /etc/snort/rules/icmp.rules
  1. Include the following mentioned line into icmp.rule file:
      alert icmp any any -> any any (msg:"ICMP Packet"; sid:477;
  1. Go ahead and save and close.

The preceding basic rule does alerting when there is an ICMP packet (ping...