Vpnet Technologies, Inc.

Leslie J Arrow

Mark R Hoke

Henk J Bots

William E Hunt

Russell C Jones

Quentin C Liu

Bruce T Huntley

One embodiment of the present invention provides a computer system for processing communications in a virtual private network. The computer system operates in a selective mode, in which only communications transiting the virtual private network are processed according to specified virtual private network parameters, such as encryption, compression and authentication algorithms. Virtual private network communications passing between a public network and a private network are thus received and processed according to the algorithms, while other communications bypass the computer system. Multiple private networks may be served by a single computer system.

Method and apparatus for processing communications in a virtual private network

The present invention provides a method and an apparatus for establishing a virtual private network that operates over a public data network. One embodiment of the present invention includes a system that selects a plurality of entities coupled to the public data network to include in the virtual private network. The system next assembles a plurality of identifiers for the plurality of entities. These identifiers are used to identify communications between the plurality of entities, so that these communications can be transferred securely over the public data network. A variation on this embodiment includes defining encryption, authentication and compression parameters for the virtual private network. In another variation, selecting the plurality of entities includes, assembling entities coupled to the public data network into groups, and selecting groups of entities to include in the virtual private network. Another variation includes defining access control rules specifying types of communications that are allowed to pass through virtual private network units. These virtual private network units are typically used to couple local area networks to the public network so that secure communications on the public network pass through the virtual private network units. Yet another variation on this embodiment includes defining address translation rules for virtual private network units coupled to the public data network. These address translation rules are used to translate local network addresses to public network addresses.

Method and apparatus for configuring a virtual private network

One embodiment of the present invention provides a computer system with a plurality of storage memories, each storage memory storing an operating system program, and an identifier for identifying a storage memory containing an operating system program to be loaded when the unit is booted. The identifier is selectively switchable between storage memories so that the computer system may be selectively booted with an alternate operating system program. This facilitates loading a new version of an operating system, and then rapidly switching back to an old version of the operating system if the new version fails to function properly.

Method and apparatus for swapping a computer operating system

One embodiment of the present invention includes a system that translates addresses in a data packet based upon a user identifier in the data packet. The system receives the data packet sent from a source node to a destination node by a user. This data packet includes a source address of the source node, a destination address of the destination node and the user identifier that identifies the user. The system uses the user identifier to look up communication privileges associated with the user. If the communication privileges allow the user to communicate with the destination node, the system replaces the source address in the data packet with a privileged address, and forwards the data packet to the destination node. In a variation on this embodiment, the privileged address is recognized by a system firewall so that it facilitates passage of the packet through firewall. In another variation, the privileged address specifies a return address of a given address translation unit and thereby facilitates load balancing across multiple address translation units. In a further variation, the system receives a reply packet from the destination node directed to the privileged address, and replaces the privileged address in the reply packet with the source address so that the reply packet is directed to the source node, before forwarding the reply packet to the source node. In another variation, receiving the reply packet includes acting as a proxy for the privileged address under the address resolution protocol. Another variation further includes authenticating, encrypting and optionally compressing the data packet.

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Mountain View, CA, United States of America

Leslie J Arrow