Outpost Firewall V1 is well out of date.
Outpost Firewall V1 was the only free version from Agnitum. The developments have gone through V2, V3, V4, 2008 and are now at 2009.
Having been through all these versions, and seeing what's in the later versions, it only highlights what's missing in V1.
While V1 was fine it its day, I would suggest one of the other free firewalls.