> I used packet filtering gateways often at a previous company and
> know their capabilities rather well.
Maybe Frank you ought to take a new look at packet screens. What you
may have used at a previous company is not what is available today. A
packet screen of old is not the same as a stateful packet screen of new.
They are two very different technologies.
Stateful Packet Screens can provide the functionality of application
relays with better scalability and better security.