We have a 3 node ELAN (100 MBPS) with 2851 connecting 1 Main and 2 satellite offices(SO). The Main office is connected to a Private Network via Nortel devices and routed accordingly. But we need to be able to connect to devices in the Nortel PN from the 2 satellites offices. The Network Security liason at the PN does not allow routing to happen to this 2 satellites office because of segments are RFC1918. They have recommended to have traffic from this SO be NAT'ED into ip's from segment from Main office. Problem is I dont know how to do this? Can this be accomplished with this setup? Do I need another device to perform the NATing?