Okay, as we were discussing cable vs. DSL internet, it occurred to me I should ask this question over here in software. What firewall software would folks recommend for a Mac running OS X (10.3.9, but I might want to upgrade to Tiger within the next year, so something that will work with my current OS but won't become obsolete when I upgrade is preferable...if that is an issue with any)? I would set up my internet to connect through airport, again, if that matters. I don't currently have anything since I just use dial-up, but I know if I'm going to be always connected, I need some form of firewall protection. I'd especially appreciate recommendations of specific software, but otherwise, even information about what I should look for in firewall software would be helpful since I really don't know what I should be looking for and what all the different terminology means in terms of types of encryption, etc., and how to know what's relevant for my purposes, which is basically just to keep someone else from gaining access to my computer and using it for nefarious purposes.