Cisco tells how at http://www.cisco.com/en/US/tech/tk827/tk369/technologies_configuration_example09186a00801e51e2.shtml
BUT this is highly dependent on your IT staffer's selection of how they want it done.
I am testing the integrity of a network and would like to know if it's possible to create a VPN tunnel from a windows xp machine to a cisco internet router? There is a checkpoint firewall between the 2 but it is allowing ipsec.
Does anyone know if this can be done and how?