@thetechfreak, AOL dont want you using a firewall thats why its so hard to set up, and yes most DoS attacks are caried out by the vast 30 Million AOL user unwantingly.

@Zonealarm in general, an overaverage Firewall, I must add,
most "so called" attacks are from your own ISP and Napster type Programs ( to inform other users as to your speed of connection E.G )

IF however some " not so nice Person " is running a port scan on you, beware... Zonelaram logs only 500 hits, this would make it possible to drop you offline, maybe clearing the logs once in a while would help !