Abuse depends on the strength of your fire-wall.  Last summer, we, at ARCO, and
some of our opposite numbers at TI (they are just down the street from here)
attempted establishing ADSM sessions across the internet, only to be thwarted by
our respective fire-walls.  Regardless, I would still be hesitant to use open
registration.

Dean Smith, dsmith8 AT is.arco DOT com