We have 2 Win 2003 servers in a Unicast NLB Cluster.
Each server has it's own IP address and the cluster has it's own IP address.
We have established a Cisco VPN tunnel between and 877 and an 878 router using the SDM interface.
Remotely, we can access each server individually but not by the cluster IP address.
Remotely, we can ping each server but not the cluster IP address.
Locally, everything works fine, and the cluster IP address responds fine.