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Mastering Linux Security and Hardening

You're reading from   Mastering Linux Security and Hardening Secure your Linux server and protect it from intruders, malware attacks, and other external threats

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Product type Paperback
Published in Jan 2018
Publisher
ISBN-13 9781788620307
Length 376 pages
Edition 1st Edition
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Author (1):
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Donald A. Tevault Donald A. Tevault
Author Profile Icon Donald A. Tevault
Donald A. Tevault
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Table of Contents (12) Chapters Close

Preface 1. Running Linux in a Virtual Environment FREE CHAPTER 2. Securing User Accounts 3. Securing Your Server with a Firewall 4. Encrypting and SSH Hardening 5. Mastering Discretionary Access Control 6. Access Control Lists and Shared Directory Management 7. Implementing Mandatory Access Control with SELinux and AppArmor 8. Scanning, Auditing, and Hardening 9. Vulnerability Scanning and Intrusion Detection 10. Security Tips and Tricks for the Busy Bee 11. Other Books You May Enjoy

Scanning for rootkits with Rootkit Hunter


Rootkits are exceedingly nasty pieces of malware that can definitely ruin your day. They can listen for commands from their masters, steal sensitive data and send it to their masters, or provide an easy-access back door for their masters. They're designed to be stealthy, with the ability to hide themselves from plain view. Sometimes, they'll replace utilities such as ls or ps with their own trojaned versions that will show all files or processes on the system except for the ones that are associated with the rootkit. Rootkits can infect any operating system, even our beloved Linux.

In order to plant a rootkit, an attacker has to have already gained administrative privileges on a system. This is one of the many reasons why I always cringe when I see people doing all of their work from the root user's shell and why I'm a firm advocate of using sudo whenever possible. I mean, really, why should we make it easy for the bad guys?

Note

Several years ago, back...

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