A system for managing secure network connections among multiple FABs and
OEMs is present that comprises: a plurality of VPN devices, one for each
FAB and OEM; a plurality of dedicated isolation LANs, each one coupled to
one of the plurality of VPN devices; and an e-diagnostic LAN, coupled to
the plurality of dedicated isolation LANs, and operative to connect any
OEM to any FAB according to authorization rules.