[Openswan Users] Connecting to other machines in subnet

[Durwin]

I have VPN setup.  Works just fine.  However, it is desired to be able
to connect to a specific machine (other then the one running VPN).  For
example,  machine A at VPN location 1 needs to connect directly to
machine C at VPN location 2.  Machine B is running VPN.  Is there a way? 
I am thinking iptables, but I only have a working knowlegde of it.


Thank you,

Durwin