Abstract: A system and method for providing secure network services. A secure computer including a processor, a memory, and a secure operating system is discussed. The secure operating system includes an operational kernel and an administrative kernel. The operational kernel includes a Type Enforcement security mechanism for restricting execution of files stored in the memory by the processor. The execution restrictions placed on files in the memory of the secure computer can only be modified from within the administrative kernel.

Abstract: A system and method for the secure transfer of data between a workstation connected to a private network and a remote computer connected to an unsecured network. A secure computer is inserted into the private network to serve as the gateway to the unsecured network and a client subsystem is added to the workstation in order to control the transfer of data from the workstation to the secure computer. The secure computer includes a private network interface connected to the private network, an unsecured network interface connected to the unsecured network, wherein the unsecured network interface includes means for encrypting data to be transferred from the first workstation to the remote computer and a server function for transferring data between the private network interface and the unsecured network interface.

Abstract: A system and method for the secure transfer of data between a workstation connected to a private network and a remote computer connected to an unsecured network. A secure computer is inserted into the private network to serve as the gateway to the unsecured network and a client subsystem is added to the workstation in order to control the transfer of data from the workstation to the secure computer. The secure computer includes a private network interface connected to the private network, an unsecured network interface connected to the unsecured network, wherein the unsecured network interface includes means for encrypting data to be transferred from the first workstation to the remote computer and a server function for transferring data between the private network interface and the unsecured network interface.

Abstract: A system and method for the secure transfer of data between a workstation connected to a private network and a remote computer connected to an unsecured network. A secure computer is inserted into the private network to serve as the gateway to the unsecured network and a client subsystem is added to the workstation in order to control the transfer of data from the workstation to the secure computer. The secure computer includes a private network interface connected to the private network, an unsecured network interface connected to the unsecured network, wherein the unsecured network interface includes means for encrypting data to be transferred from the first workstation to the remote computer and a server function for transferring data between the private network interface and the unsecured network interface.

Abstract: A system and method for the secure transfer of data between a workstation connected to a private network and a remote computer connected to an unsecured network. A secure computer is inserted into the private network to serve as the gateway to the unsecured network and a client subsystem is added to the workstation in order to control the transfer of data from the workstation to the secure computer. The secure computer includes a private network interface connected to the private network, an unsecured network interface connected to the unsecured network, wherein the unsecured network interface includes means for encrypting data to be transferred from the first workstation to the remote computer and a server function for transferring data between the private network interface and the unsecured network interface.

Abstract: A system and method of achieving network separation within a computing system having a plurality of network interfaces. A plurality of burbs or regions is defined, wherein the plurality of burbs includes a first and a second burb and wherein each burb includes a protocol stack. Each of the plurality of network interfaces is assigned to one of the plurality of burbs and more than one network interface can be assigned to a particular burb. Processes are bound to specific burbs when they try to access that burb's protocol stack and communication between processes assigned to different burbs is restricted so that a communication between a process bound to one burb must pass through a proxy before being sent to a different burb.

Abstract: An external portion or burb of a host computer receives messages from external servers representative of accurate time from one or more peer computers coupled by a network. A process called a client on the external burb processes the messages and then accurately sets a host computer clock. Processes called servers running on an internal burb which may not communicate directly with peers, then access the clock to obtain a correct indication of network time without having to communicate directly with the peer computers. The time is then provided to internal clients. This allows a host computer without an expensive clock to update its clock and enable it to provide accurate time to processes running on the host.

Abstract: A system and method of achieving network separation within a computing system having a plurality of network interfaces. A plurality of burbs or regions is defined, wherein the plurality of burbs includes a first and a second burb and wherein each burb includes a protocol stack. Each of the plurality of network interfaces is assigned to one of the plurality of burbs and more than one network interface can be assigned to a particular burb. Processes are bound to specific burbs when they try to access that burb's protocol stack and communication between processes assigned to different burbs is restricted so that a communication between a process bound to one burb must pass through a proxy before being sent to a different burb.

Abstract: A system and method for the secure transfer of data between a workstation connected to a private network and a remote computer connected to an unsecured network. A secure computer is inserted into the private network to serve as the gateway to the unsecured network and a client subsystem is added to the workstation in order to control the transfer of data from the workstation to the secure computer. The secure computer includes a private network interface connected to the private network, an unsecured network interface connected to the unsecured network, wherein the unsecured network interface includes means for encrypting data to be transferred from the first workstation to the remote computer, a server function for transferring data between the private network interface and the unsecured network interface and a filter function for filtering data transferred between the remote computer and the workstation.

Abstract: An integrated remote execution system manages resources and provides for the distributed and remote execution of remote requests to those resources in a heterogenous computer network environment that has a plurality of resources loosely coupled to each other. The resources include at least two or more computer processors executing different operating system programs and any memory devices and subordinate programs operating together with the computer processors. Three major components are integrated into a single system by providing for a common remote execution interface that is incorporated into the requesting application program to provide a single programming interface for making remote requests to the system, a separate resource management component to provide information about the various resources in the network, and a remote service routine that can be executed on any of the computer processors selected perform the remote request.