Hello to you from Montreal, Quebec!

Using Knoppix 3.3 I succesfully and easily connected to my high speed connection with the wizard for ADSL/PPPoe connection.

When I'm using Windows 98 I use a firewall name Zonealarm and it does cut intrusion from the outside in my system(even programs who want to connect to the net without my knowing about)

What program or firewall is there available with Knoppix?
I have heard that Linux system are better protected, is this true?

Also in using the wizard for connecting it wrote to use poff command to end a session, but it doesnt work and on the tldp.org site cannot fing the answear on how to use poff command to close the connection, any docs I can read on this or any helpfull hints?