I installed and used this fw for a while, it is nice and
simple for most users, but when it seems to have ports open,
or so was reported by www.grc.com This was a while back, so
they may have fixed these problems. If you are looking for
firewalls then I would say that sygate is a good choice, as
is ez firewall (ca) which is an incarnation of zone alarm.
If you want to ask the experts then perhaps you should visit
the news server for grc, found at news.grc.com