Re: firewalls ...
I don't know about anyone else's reading of your post, but you just told
me a whole lot of nothing. You didn't even explain enough about what
you're referring to for a person to be able to Google what you're
Firewalls only have a little to do with it - but you can essentially
set up the equivalent of a VPN without using VPN software. The only
down side is that every user has to be authenticated. But your AP can
be completely open - and yet unauthorized users can't do anything
except 'jam' your communications - something they can easily do even
with a secured wireless net. There are documents out on the net on
how to set up an AP like this - it's been done a few years ago.