3 of the people on this threat attend Indiana University. Our university supports two solutions, either PP2P, or L2TP over IPSEC. It would seem that L2TP over IPSEC will be the easiest solution to implement. This page here (http://www.jacco2.dds.nl/networking/linux-l2tp.html) has instructions on setting up a linux machine as a L2TP over IPSEC VPN client.