Win2000 VPN client through SuSE Linux Firewall to VPN server?

I have a SuSE Linux 7.2 Server connected via Cable-Modem to the Internet. It's running SUSEFirewall and masquerading for my internal network which is mostly Windows 2000. One of the Win2000 machines would like to VPN across the Internet to another Win2000 server. First shot out of the box, this didn't work :) Is this possible, first of all? Secondly, can anyone give me any hints/tips/caveats? I really just need a push in the right direction (terms, acronyms, resources), I'm pretty good with leg-work and research, but I'm not sure where to begin, being a Linux n00b. Many thanks, John Marquardt marquardt@mindspring.com