Altor Networks, Inc., a Juniper Networks Company, is a provider of security for virtual data centers and clouds. The company developed the world’s first firewall purpose-built for virtual networks, a software security "appliance" that runs in a virtualized environment and enforces security policy on a per-virtual-machine basis. Data center administrators could pinpoint a broad range of virtual network security comprises and create roles-based security policies. Security policies could be continuously enforced on individual virtual machines (VM), even as they moved throughout the virtualized data center.