Hello,
I'm Frans van Beers and for years now I've got a pc column in a Dutch paper.
Today for the first time I took a look and test at the firewall. First impression: great.
I've used ZoneLabs (just removed ;-) Sygate, Outpost, but this one might do the job for free.
And if it still does after a few months of testing I'm sure going to tell my readers about it!
If your Dutch is good enough

:
http://www.vanbeersnet.nl/monitor/cheers form the Netherlands,
Frans