Minimal hardware recommendations for SSLVPN?

Greetings,

I would just like to run the SSLVPN appliance, or maybe the free home use appliance on a D945GSEJT with an additional Intel Pro 100 Dual PCI card. 2 gigs of ram are availabe, as well as a small hard disk.

do you think this is sufficient for that?

also, would it be possible to run the SSLVPN part alone on a ALIX-Board (single-homed)?
what´s the minimal hard disk size for the smallest possible installation?

have you all a great day!

Cheers
Guybrush