Book Image

Securing Network Infrastructure

By : Sairam Jetty, Sagar Rahalkar
Book Image

Securing Network Infrastructure

By: Sairam Jetty, Sagar Rahalkar

Overview of this book

Digitization drives technology today, which is why it’s so important for organizations to design security mechanisms for their network infrastructures. Analyzing vulnerabilities is one of the best ways to secure your network infrastructure. This Learning Path begins by introducing you to the various concepts of network security assessment, workflows, and architectures. You will learn to employ open source tools to perform both active and passive network scanning and use these results to analyze and design a threat model for network security. With a firm understanding of the basics, you will then explore how to use Nessus and Nmap to scan your network for vulnerabilities and open ports and gain back door entry into a network. As you progress through the chapters, you will gain insights into how to carry out various key scanning tasks, including firewall detection, OS detection, and access management to detect vulnerabilities in your network. By the end of this Learning Path, you will be familiar with the tools you need for network scanning and techniques for vulnerability scanning and network protection. This Learning Path includes content from the following Packt books: •Network Scanning Cookbook by Sairam Jetty •Network Vulnerability Assessment by Sagar Rahalkar
Table of Contents (28 chapters)
Title Page
Copyright and Credits
About Packt
Contributors
Preface
Index

Downloading and installing Nmap


Nmap is a free and open source network scanning and audit tool available at https://Nmap.org/. This tool is one of the most important components of a network-level security audit, as it allows the user to monitor or observe the network-level posture of a host by providing data about open ports and services running on these ports. The Nmap tool also allows interaction with these services and the running of various scripts using Nmap Script Engine (NSE). The following command is the syntax to perform TCP syn full port scanning on the host 127.0.0.1:

Nmap -sS -p1-65535 127.0.0.1

We will be looking into recipes for the usage of the Nmap tool in further chapters.

Getting ready

Nmap is available in various versions and formats based on the architecture and operating system supported by the user machine. Nmap also has a GUI version, called Zenmap, which provides better visibility of the options to select the commands to run. It is also available as a default tool as...