Quote Originally Posted by Bukowski

That has to be the worst piece of advice I've ever seen offered. If you're online you're going to get scanned. And you're in just as much danger with Linux as Windows, I can see you've never had to secure a server. Lets take a quick look at a default Knoppix HDD installation with nmap:
Well if you are going to give advice at least be truthful about it. Those ports are not open after an install you have upgraded the install without removing the servers and they have been started you because you have accepted the default Debian scripts instead of keeping the Knoppix ones.