I had an EXTERNAL FIREWALL on....Alpha
Shield, all the OS (Tiger 10.4) locked down tight, and ALL SHARING,
turned OFF.

And the internal firewall turned ON.

This was on a I-Mac G-5.

This psycho exploited I-Chat, and the Dashboard programs, there are
some kind of 'back door' exploits there that Apple has failed (so
far) to FIX.

OK, so does Unbuntu need an anti-virus program, or not?

Can you burn music CD's on Linux/Unix?

How hard would it be to lock down a Linux machine to where it's very,
very hard to penetrate by a hacker?

Could you explain how you might do this.

Does Linux have it's own INTERNAL FIREWALL? If so, is it a good
firewall?