Graham Murray wrote:[color=blue]
> "Gaz" <gazter@msn.com> writes:
>[color=green]
>> SPI is to do with internet packet inspection, is it not???[/color]
>
> Google would seem to indicate otherwise. The first hit on the query
> 'SPI' returns the Wikipedia article for 'Serial Peripheral Interface'[/color]

Good example of why not to rely on websearches alone. SPI with respect
to firewalls is Stateful Packet Inspection.