1. An asset management system comprising: a plurality of asset monitoring devices located behind firewalls under control of different third party entities, each monitoring device configured to sense an asset status of an asset; a device server configured to receive the asset status of the asset from the monitoring device; a forwarding service implemented on a network server, the forwarding service including an asset-side network address configured to receive an asset status message representative of the asset status of the asset through the firewall, and a management-side network address configured to receive the asset status message from the asset-side network address through a virtual tunnel; and an asset management engine in communication with the management-side network address, the asset management engine configured to receive the asset status message and to compare data within the asset status message to criteria stored within an alert database to determine if an alert should be generated.