[Openswan Users] Virtual IP Question

[Vernon A. Fort]

I need to setup/configure a FC3 box with a tunnel so it ONLY connects to 
a specific internal host.  The problem is the right side already has 
this ip address/network defined to some other client.  ALL I really need 
is a HOST-TO-HOST setup but I need to NAT/MAP a virtual IP to the real 
internal host:

    x.x.x.x -> FIREWALL -> {192.168.91.1 NAT 192.168.1.1}

The FC3 box does BOTH firewall and IPSEC.

Can someone point me in the right direction/documentation or provide a 
sample configuration file?

Vernon