The ability to detect people trying to compromise your system.
Intrusion detection is divided into two main categories, host based, and network based.
This document describes how to setup an Intranet using Linux as the server which binds Unix, Netware, NT and Windows together. This document aims to describe how to obtain, install and configure the enhanced IP firewalling chains software for Linux, and some ideas on how you might use them. As well as the basic dial-up procedure and IP establishment, email and news handling is covered. It is responsible for starting the system in single user mode or spawning a shell to read the startup files. A data structure holding information about files in a Unix file system.