IPSec VPN with Public IP as the local subnet and remote subnet

[josephpjob]

Hi,

Is it possible in Pfsense to setup IPSec with Public IP as the local and remote network.

The host in local subnet is using Private IP and is NATED to public IP using 1:1 NAT. Then I need to use this Public IP for establishing VPN with remote end, will this work??. At remote side the VPN box is NetScreen ISG1000

Thanks,
Joseph