Openswan		  NAT-	      Internet      Openswan                  (Server Subnet) 
 (Client Subnet 10.10.10.0/24)   ...  Client  --------- device  =================== Server (192.168.1.1 )... 192.168.1.0/24
 				     192.168.0.2        /    \ 
 				     		       /      \
 					192.168.0.1/24      X.X.X.X                 Y.Y.Y.Y		                       /      \