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Practical Linux Security Cookbook

You're reading from   Practical Linux Security Cookbook Secure your Linux machines and keep them secured with the help of exciting recipes

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Product type Paperback
Published in Apr 2016
Publisher Packt
ISBN-13 9781785286421
Length 276 pages
Edition 1st Edition
Tools
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Authors (2):
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Michael A Lindner Michael A Lindner
Author Profile Icon Michael A Lindner
Michael A Lindner
Tajinder Kalsi Tajinder Kalsi
Author Profile Icon Tajinder Kalsi
Tajinder Kalsi
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Toc

Table of Contents (12) Chapters Close

Preface 1. Linux Security Problems 2. Configuring a Secure and Optimized Kernel FREE CHAPTER 3. Local Filesystem Security 4. Local Authentication in Linux 5. Remote Authentication 6. Network Security 7. Security Tools 8. Linux Security Distros 9. Patching a Bash Vulnerability 10. Security Monitoring and Logging Index

Monitoring a network using Nmap


For any network that is either big or small, network monitoring and security is a very essential task. Regular monitoring of the network is important to protect systems from attacks and also to keep viruses and malware out of a network.

Nmap, short for network mapper, is a free and open source tool that monitors a network, and it is the most versatile tool used by system/network administrators. Nmap can be used to perform security scans, explore a network, find open ports on remote systems, and perform network audits.

Getting ready

To show how Nmap works, we need a minimum of two systems to form a small network. On one system, we will install the nmap package, while the other system will be used as a host to scan.

How to do it…

In this section, we will take a look at how to use Nmap to perform different types of scans.

  1. The first step will be to install the nmap package if it is not installed already. To do so, we use this command:

    apt-get install nmap
    

    We get the...

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