Operating System Security

Running head: OPERATING SYSTEM SECURITY
Operating system security
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1OPERATING SYSTEM SECURITY
Executive Summary
With the increasing number of data as well as security breaches it becomes important to
secure the operating systems. For this one of the most common tools are used IPtables. The
following table contributes to the discussion on the Use of IP tables to secure the Kali Linux
systems.

2OPERATING SYSTEM SECURITY
Table of Contents
Introduction................................................................................................................................3
Part 1: Methodology for Securing the Kali Linux.....................................................................3
Methodology for Securing the Kali Linux OS...........................................................3
Part 2: Demonstration of the Methodology................................................................................4
IPtable........................................................................................................................4
Use of IPtables to block filter and drop the incoming data packets...........................................6
Conclusion................................................................................................................................15
References................................................................................................................................16

3OPERATING SYSTEM SECURITY
Introduction
In today’s vulnerable computing environment data packets that are flowing inside
and outside a specific network can be are intercepted using different tools and techniques,
analysed and manipulated to bring down that network. For this specific paper, we are
analysing the use of adding entry to the IPtables and firewall rules to restrict the unwanted
data traffic coming or going outside the system (Jung and Sung 2015). We are using Kali
Linux OS in order to implement this security mechanism.
Following report contributes to the discussion of the utilization of IPtables and
firewall rules to secure an operating system. In addition to that, firewall rules that are
implemented and effectiveness are also provided in different sections of this report.
Part 1: Methodology for Securing the Kali Linux
Methodology for Securing the Kali Linux OS
For Linux operating systems the IPtables is one of the best command-line tools that
can be used firewall utility for this operating system. The IPtables uses policy chains in order
to block or allow traffic to the system (Tekeoglu and Tosun 2016). Every time a network
based connection attempts to set up a connection to the system, IPtables checks for a rule in
its created list to match and try to follow the policies.
For this project we created the following methodology to secure the Linux based
systems so that, the servers using the operating system can check analyse and take action
accordingly for any kind of network based attack to the system. Following are the stages in
this methodology,
 Determining the type of the attack