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Mastering Linux Security and Hardening

You're reading from   Mastering Linux Security and Hardening Protect your Linux systems from intruders, malware attacks, and other cyber threats

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Product type Paperback
Published in Feb 2020
Publisher
ISBN-13 9781838981778
Length 666 pages
Edition 2nd 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 (20) Chapters Close

Preface 1. Section 1: Setting up a Secure Linux System
2. Running Linux in a Virtual Environment FREE CHAPTER 3. Securing User Accounts 4. Securing Your Server with a Firewall - Part 1 5. Securing Your Server with a Firewall - Part 2 6. Encryption Technologies 7. SSH Hardening 8. Section 2: Mastering File and Directory Access Control (DAC)
9. Mastering Discretionary Access Control 10. Access Control Lists and Shared Directory Management 11. Section 3: Advanced System Hardening Techniques
12. Implementing Mandatory Access Control with SELinux and AppArmor 13. Kernel Hardening and Process Isolation 14. Scanning, Auditing, and Hardening 15. Logging and Log Security 16. Vulnerability Scanning and Intrusion Detection 17. Security Tips and Tricks for the Busy Bee 18. Assessments 19. Other Books You May Enjoy

Creating and managing keys for passwordless logins

The SSH, is a great set of tools that communications with remote servers. You can use the SSH component to remotely log into the commandline of a remote machine, and you can use either scp or sftp to securely transfer files. The default way to use any of these SSH components is to use the username and of a person's normal Linux user account. So, logging into a remote machine from the Terminal of my OpenSUSE workstation would look something like this:

donnie@linux-0ro8:~> ssh donnie@192.168.0.8
donnie@192.168.0.8's password:

While it's true that the username and password go across the network in an encrypted format, making it hard for malicious actors to intercept, it's still not the most secure way of doing business. The problem is that attackers have access to automated tools that can perform brute-force...

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