October 2018
Beginner
160 pages
2h 18m
English
Content preview from Linux Essentials for Cybersecurity Lab Manual, First Edition
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Chapter 31. Firewalls
This lab should be performed on the CentOS operating system that you installed in Chapter 1, “Distributions and Key Components.” Before you begin this lab, log in to the student account that you created during the installation process.
Lab 31.1 Creating a Firewall to Protect a System
Scenario: Using the iptables command, create a firewall for the local system that meets the following objectives:
Allows incoming connections for the SSH and FTP ports from any system
Allows incoming connections for the telnet port for any system in the 192.168.1.0/24 network
Logs all other incoming connections
Drops all other incoming connections by changing the default policy
Note
Do not save the changes you make during this lab exercise. ...
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