Chapter 8. Security

Table of Contents

User Management
Where is root?
Adding and Deleting Users
User Profile Security
Password Policy
Other Security Considerations
Console Security
Disable Ctrl+Alt+Delete
GRUB Password Security
Firewall
Introduction
ufw - Uncomplicated Firewall
IP Masquerading
Logs
Other Tools
References
AppArmor
Using AppArmor
Profiles
References
Certificates
Types of Certificates
Generating a Certificate Signing Request (CSR)
Creating a Self-Signed Certificate
Installing the Certificate
References

Security should always be considered when installing, deploying, and using any type of computer system. Although a fresh installation of Ubuntu is relatively safe for immediate use on the Internet, it is important to have a balanced understanding of your systems security posture based on how it will be used after deployment.

This chapter provides an overview of security related topics as they pertain to Ubuntu 8.04 Server Edition, and outlines simple measures you may use to protect your server and network from any number of potential security threats.