I used to leech Internet access from a neighbor, but after they gave me grief about it, I set up my own wireless network and am paying for my own Internet. Good citizen, right? Problem is, every time I start up my trusty old MacBook it automatically picks my neighbor's network and I have to explicitly switch it to use my own. Isn't there some way to fix this annoying wifi network behavior??

I travel a lot and often find myself needing to chat with colleagues back at the office via instant message (usually MSN but sometimes Yahoo). Problem is, I really don't want everyone else in the café using the open wireless network from sniffing the discussion. Is there some secure solution that's easy and portable?

I've become paranoid about security on my Mac laptop and just bumped into a story about some hackers who claim that they can break into a Mac laptop via the wifi connection. Yikes! How do I disable the hole so that no-one can use this exploit to get into my computer??

A question about DMZ's: We run a privately addressed network(192.168...) on a workgroup. We have a server running DHCP. If I set up a DMZ on a managed switch I would like to know if a potentially infected (spyware/trojans) PC which is then plugged into it would be able to infect the server.