You can set up a PPTP-based VPN if you have NT in the mix (client server or both). I recommend that you upgrade the server (although the $800 price tag stinks) to 2000 and use an IPSec-based VPN (especially if you are not familiar with setting up VPNs). If you decide to upgrade to 2k here is a link that shows you how to set up a VPN on 2k: http://www.microsoft.com/windows2000/technologies/communications/vpn/default.asp
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