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

Requirements for vulnerability scoring


Take any modern-day network and scan it for vulnerabilities. You'll be overwhelmed and find tons of vulnerabilities. Now, if you keep scanning the network, say monthly, then your inventory of vulnerabilities will keep growing rapidly. If all these vulnerabilities are presented as is to the senior management, then this will not be of any help. Senior management is more interested in some precise information that would be actionable.

A typical vulnerability scanner may find 100 vulnerabilities in a particular system. Out of 100, 30 may be false positives, 25 may be informational, 25 may be low severity, 15 may be medium severity, and five may be high-severity vulnerabilities. Naturally, out of 100 reported vulnerabilities, the five high-severity vulnerabilities are to be addressed as a priority. The rest can be taken care of later as per resource availability.

So, unless a vulnerability is scored, it cannot be assigned a severity rating and hence it cannot...