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Red Hat Enterprise Linux Server Cookbook

You're reading from   Red Hat Enterprise Linux Server Cookbook Over 60 recipes to help you build, configure, and orchestrate RHEL 7 Server to make your everyday administration experience seamless

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Product type Paperback
Published in Dec 2015
Publisher
ISBN-13 9781784392017
Length 250 pages
Edition 1st Edition
Tools
Concepts
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Authors (2):
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Jakub Gaj Jakub Gaj
Author Profile Icon Jakub Gaj
Jakub Gaj
William Leemans William Leemans
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William Leemans
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Toc

Table of Contents (12) Chapters Close

Preface 1. Working with KVM Guests FREE CHAPTER 2. Deploying RHEL "En Masse" 3. Configuring Your Network 4. Configuring Your New System 5. Using SELinux 6. Orchestrating with Ansible 7. Puppet Configuration Management 8. Yum and Repositories 9. Securing RHEL 7 10. Monitoring and Performance Tuning Index

Securing the system login


The default settings applied to system login are based on what Red Hat deems basic security. If, for some reason, you want to change this, this recipe will show you a couple of examples. Authconfig has two tools that you can use to configure authentication: authconfig and authconfig-tui.

These two tools configure pam for you in such a way that the changes are consistent throughout rpm updates.

The authconfig-tui tool is not as feature-rich as the plan authconfig tool, which I personally recommend you to use as it allows you to do more.

You can manually edit the files located in /etc/pam.d if and when you know what you're doing, but this is not recommended.

How to do it…

Perform the following steps:

First, change the hash encryption of the passwords stored in /etc/shadow to sha512, as follows:

~]# authconfig --passalgo=sha512 --update

Enable NIS authentication through the following command:

~]# authconfig --enablenis –nisdomain=NISDOMAIN --nisserver=nisserver.example.com...
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