XD Guardian XML by Owl Cyber Defense is a dual-guard, quad-diode cross domain appliance designed for secure data transfer between systems of differing security levels. It supports hardware-enforced unidirectional and bidirectional transfer modes and is configured as a 1U rack-mountable unit for enterprise applications or isolated environments. XD Guardian XML has been assessed against U.S. government requirements for cross domain solutions and is exportable for use by coalition operations, foreign governments, defense organizations, and commercial entities.