Linux Security and Hardening - TED Learning

Course Introduction

Keep yourself and your company out of the news by protecting your Linux systems from hackers, crackers, and attackers!

This course will not only teach you the security concepts and guidelines that will keep your Linux servers safe, it will walk you through hardening measures step-by-step and also teaches how to secure an Enterprise Linux system to comply with security policy requirements. Many security policies and standards require systems administrators to address specific user authentication concerns, application of updates, system auditing and logging, file system integrity, and more. Linux Server Hardening provides strategies for addressing specific policy and configuration concerns.

Some of what you will learn by taking this Linux Security and Hardening course:

• How to protect your Linux systems against hackers.
• Ways to prevent attackers from breaking into your systems, even when they have physical access to your machine.
• How to enforce strong password policies and control password as well as account aging policies on your Linux servers.
• SSH Hardening practices.
• Network security tactics.
• Port scanning and network service detection.
• How the Linux firewall works and exactly how to configure it.
• How to protect the superuser (root) account.
• Ways to share accounts securely with an audit trail.
• File system security and encryption.
• Using and configuring sudo, and why you need to.
• Advanced Linux permissions include special modes, file attributes, and access control lists (ACLs).

Course Outline

Module 1 : General Security

• Is Linux Secure?
• What Makes Linux Secure?
• Security Guidelines and Principles

Module2 : Physical Security

• Physical Security Concepts
• Single User Mode Security
• Single User Mode and Blank Passwords
• Securing the Boot Loader
• Disk Encryption
• Encrypting a New Device
• Encrypting an Existing Device
• Disabling Control Alt Delete

Module 3: Account Security

• Intro to PAM
• Password Security
• Controlling Account Access
• Security by Account Type

Module 4: Network Security

• Network Security
• Securing SSHD
• Linux Firewall Fundamentals
• Configuring the Firewall from the Command Line
• Firewall Rule Specifications
• Linux Firewall Demonstration

Module 5: File System Security

• File and Directory Permissions
• Special Modes
• File Attributes
• ACLs
• Rootkits
• Rootkit Detection Software
• Linux Hardening Guides

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