Posted: June 22nd, 2006, 5:00am CDT by Peter
If you want to see what is coming in and out of your computer or if you have a ubuntu computer as a router and want to analyze data coming in and out of your network there is a very simple way to do it. A program called ethereal can analyze all sorts of connections to and from your computer.
To get it, open the terminal and write (without quotes) "sudo apt-get install ethereal" and answer "Y"