International Business Machines Corporation

Chandra Paul Immanuel

Shaw-Ben Shi

Daniel Edward House

John Ryan McGarvey

Richard Lee Daugherty

Marc Adam Kaplan

Israel Cidon

Inder Sarat Gopal

Shay Kutten

John G Dudley

Allan K Edwards

Chee-Seng Chow

Theodore E Tedijanto

Rachel A Bodner

The present invention provides an improved method and system for unobtrusively achieving secure cross-platform access in a heterogeneous network environment. In a system aspect, the system includes a plurality of heterogeneous computer systems, at least two of the computer systems including a system specified user identification; and an enterprise directory service, the enterprise directory service being shared by the plurality of computer systems to provide for the formation of an enterprise group, the enterprise directory service including at least one enterprise user which is associated with system specified user identification from the at least two of the computer systems. The system in the network in accordance with the present invention may perform cooperative programming with other systems in the same enterprise group. Systems within the same enterprise group are allowed to define enterprise users between them. Enterprise groups establish boundaries of who can and cannot share enterprise user definitions. They also establish administrative groups of systems. They establish where trusted directory servers must, can, and cannot reside. They also establish which enterprise directory service adapter can interact, i.e., scope of impersonation. By allowing for the grouping of systems, access to systems in the network may be more readily controlled. Unnecessary or undesirable access may be minimized.

Method and system for grouping of systems in heterogeneous computer network

The present invention provides a method and system for providing cross-platform access to Internet users of a heterogeneous grouping of computers. In a system aspect, the system includes a plurality of heterogeneous computer systems, at least one of the plurality of computer systems including an Internet user identity; and an enterprise directory service, the enterprise directory service being shared by the plurality of computer systems, the enterprise directory including at least one enterprise role which is associated with the Internet user identity, the at least one enterprise role capable of being used to access the plurality of computer systems independently of any specific operating system user identification. By allowing enterprise roles to be defined independently of any specific operating system user identification, flexibility is injected into the network configuration and Internet user aggravation is reduced. Enterprise roles may also be provided in the context of enterprise groups, allowing access to systems in the network by Internet users to be more readily controlled.

Method and system for providing cross-platform access to an internet user in a heterogeneous network environment

A packet communications network in which multicast transmissions are made reliable by transmitting acknowledgements to all neighbors of every receiving node, including the source node. This allows the relinquishment of message holding buffers as soon as all near neighbors acknowledge receipt of the message after only tile longest round trip time to the nearest neighbors, rather than the round trip to the furthest destination. Moreover, highly reliable ancillary point-to-point transmission facilities can be used to retransmit multicast messages indicated as being lost by failure of acknowledgment. Finally, network partitions occurring during the multicast procedure do not necessarily lose the multicast message to the remote partitions since any node receiving the message can insure delivery to all other nodes in that partition.

Reliable multicasting over spanning trees in packet communications

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Durham, NC, United States of America

Chandra Paul Immanuel