My network consist of an ISA server connected to the internet but I have multiple locations behind the ISA server. I have several public IP addresses assigned to the external interface. What I have noticed is that getting access to the web from any of the locations behind the ISA server uses the first IP address on the external interface as the source address. Is there any way to have a different IP address on the external interface represent a different network behind the ISA server. The reason we want to do this is, we subscribe to certain services that authenticate based upon our ip addresses. Since these services think that the source is from the one ip address all location have access to these services. We don't want all the locations to have access to all the services. In fact, some of the locations subscribe to the same service but with different feature sets. I don't know if ISA can handle this type situation. Any suggestion would be greatly appreciated..... Thanks.... Jimmy Lee