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Securing Network Infrastructure

You're reading from   Securing Network Infrastructure Discover practical network security with Nmap and Nessus 7

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Product type Course
Published in Mar 2019
Publisher
ISBN-13 9781838642303
Length 538 pages
Edition 1st Edition
Tools
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Authors (2):
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Sairam Jetty Sairam Jetty
Author Profile Icon Sairam Jetty
Sairam Jetty
Sagar Rahalkar Sagar Rahalkar
Author Profile Icon Sagar Rahalkar
Sagar Rahalkar
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Toc

Table of Contents (28) Chapters Close

Title Page
Copyright and Credits
About Packt
Contributors
Preface
1. Introduction to Network Vulnerability Scanning FREE CHAPTER 2. Understanding Network Scanning Tools 3. Port Scanning 4. Vulnerability Scanning 5. Configuration Audits 6. Report Analysis and Confirmation 7. Understanding the Customization and Optimization of Nessus and Nmap 8. Network Scanning for IoT, SCADA/ICS 9. Vulnerability Management Governance 10. Setting Up the Assessment Environment 11. Security Assessment Prerequisites 12. Information Gathering 13. Enumeration and Vulnerability Assessment 14. Gaining Network Access 15. Assessing Web Application Security 16. Privilege Escalation 17. Maintaining Access and Clearing Tracks 18. Vulnerability Scoring 19. Threat Modeling 20. Patching and Security Hardening 21. Vulnerability Reporting and Metrics 1. Other Books You May Enjoy Index

Understanding Nmap Script Engine and its customization


The Nmap Script Engine is used to run custom scripts written by users to automate network-level actions. Typically, Nmap scripts end with a .nse extension. These scripts are used to perform the following tasks:

  • Host and port discovery: The whole purpose of Nmap being so widely used is to perform simple tasks to check whether the remote host is live or non-live, along with the current status of the ports.
  • Version detection: Nmap has a database of a variety of application and service signatures which are checked against the responses received from the ports to identify the service running on the port and sometimes the specific version as well.
  • Affected vulnerabilities: Nmap Script Engine allows users to determine whether a particular port/service is vulnerable to a specific disclosed vulnerability. It depends on the script written by the user to query data from the service running and sends custom packets based on a response to determine...
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