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

Gaining remote access


So far in this book, we have seen various techniques and tools that could be used to gather information about the target and enumerate services running on the system. We also glanced at the vulnerability assessment process using OpenVAS. Having followed these phases, we should now have sufficient information about our target in order to actually compromise the system and gain access.

Gaining access to a remote system can be achieved in either of the two possible ways as follows:

  • Direct access
  • Target behind the router

 

Direct access

In this type, the attacker has direct access to the target system. The attacker essentially knows the IP address of the target system and connects to it remotely. The attacker then exploits an existing vulnerability on the target system which gives further access.

Target behind router

 

In this scenario, the target machine is behind a router or a firewall with Network Address Translation (NAT) enabled. The target system has private IP address and...