I've not been able to to get the NetScreen Remote VPN client to work with a Parallels 3.0 XP desktop. The tunnel comes up according to the firewall and client logs, but the traffic's not finding it's way to the XP desktop. I suspect it's because of the DHCP server/NAT method the XP desktop uses to share the MAC OS network connection, but I don't have much familiarity with Parallels. Any suggestions/experiences would be much appreciated. Thanks.
Bridge the interface Create a bridged interface rather than a shared interface. That bridged interface will then get its own IP address and won't have any problems with NAT. (thanks for that answer from Guy Davies at Juniper)