Using ntop, iftop and apachetop to Monitor Traffic on Ubuntu

Not monitoring your server's network traffic is the equivalent of driving a car with your eyes closed. You must at all times be aware of your server's traffic. Just checking the logs is simply not enough. The tools that I will show you today generate traffic statistics, and show traffic usage in realtime. Statistics that would be hard for you to obtain otherwise. For a secure server, using such tools is mandatory.

Ntop

Ntop is a top-like application with a web frontend, designed to monitor network activity and generate reports on the console or via your web browser.

Installing Ntop on Ubuntu 8.04.1 Server

Article and code continues at:
http://www.linuxsecurityforum.org/