Chapter 9. Advanced Security Features
FreeBSD includes a variety of tools for securing network traffic and users. You can allow and disallow connections to or from certain parts of the Internet. You can cage users in a virtual machine, or jail, where they can access everything that's important to them but nothing that's important to you. Packet filtering lets you control who can access your system. In this chapter, we'll examine these tools and techniques, look at monitoring your system's security, and discuss how to react if you suffer an intrusion.
Let's start with a very basic security topic: unprivileged users.
An unprivileged ...