we have a multisubnets network behind a firewall and we want to be able to identify from the public side of the firewall the originating subnet of each request. To achieve that, we wanted to map a specific public ip address on the firewall (with multiple addresses bound to the same public interface) to each subnet which can allow us to know the originating subnet but we were unable to find a way to do that with ISA. Does someone know a way to achieve this kind of setup or is this impossible with Microsoft ISA ? Thanks by advance.