Abstract: A system and method are disclosed for providing enhanced computer network security by scanning data, specifically electronic mail messages, sent to the network before the data is received and transmitted by the network's mail server. An e-mail message is received by a computer network configured to receive data and is checked as the data is received and before it is transmitted to a node on the computer network. The method includes determining whether an external source is attempting to establish a mail connection with the computer network configured to include a data scanning device that recognizes one or more data transfer protocols. Once the data is received the data scanning device begins evaluating the data by first determining whether the data is formatted according to one of the recognized protocols. The data scanning device begins scanning the data for acceptable content and format according to a rule set established by one of the recognized protocols.

Abstract: A system and method are disclosed for maintaining the state of a virtual connection supported by an active connection manager on a standby connection manager. The method includes configuring the standby connection manager to include a physical machine object that stores a physical IP address of a physical machine that is available to the active connection manager and a virtual machine object that stores a virtual IP address of a virtual machine that is implemented on the connection manager. A replication packet is received at the standby connection manager from the active connection manager wherein the replication packet includes a foreign IP address, the virtual IP address and the physical IP address. A standby connection object is stored in the connection manager. The standby connection object includes the foreign IP address, the virtual IP address and the physical IP address from the replication packet on the standby connection manager.

Abstract: A system and method are disclosed for providing enhanced computer network security by scanning data, specifically electronic mail messages, sent to the network before the data is received and transmitted by the network's mail server. An e-mail message is received by a computer network configured to receive data and is checked as the data is received and before it is transmitted to a node on the computer network. The method includes determining whether an external source is attempting to establish a mail connection with the computer network configured to include a data scanning device that recognizes one or more data transfer protocols. Once the data is received the data scanning device begins evaluating the data by first determining whether the data is formatted according to one of the recognized protocols. The data scanning device begins scanning the data for acceptable content and format according to a rule set established by one of the recognized protocols.

Abstract: A system and method are disclosed for maintaining the state of a virtual connection supported by an active connection manager on a standby connection manager. The method includes configuring the standby connection manager to include a physical machine object that stores a physical IP address of a physical machine that is available to the active connection manager and a virtual machine object that stores a virtual IP address of a virtual machine that is implemented on the connection manager. A replication packet is received at the standby connection manager from the active connection manager wherein the replication packet includes a foreign IP address, the virtual IP address and the physical IP address. A standby connection object is stored in the connection manager. The standby connection object includes the foreign IP address, the virtual IP address and the physical IP address from the replication packet on the standby connection manager.

Abstract: A system and method are disclosed for providing enhanced computer network security by scanning data, specifically electronic mail messages, sent to the network before the data is received and transmitted by the network's mail server. An e-mail message is received by a computer network configured to receive data and is checked as the data is received and before it is transmitted to a node on the computer network. The method includes determining whether an external source is attempting to establish a mail connection with the computer network configured to include a data scanning device that recognizes one or more data transfer protocols. Once the data is received the data scanning device begins evaluating the data by first determining whether the data is formatted according to one of the recognized protocols. The data scanning device begins scanning the data for acceptable content and format according to a rule set established by one of the recognized protocols.

Abstract: A system and method are disclosed for simulating a plurality of TCP connections directed toward an Internet site under test. The method includes activating a producer thread process. The producer thread process includes randomly determining an IP address and requesting a TCP layer process to make a TCP connection to the randomly determined IP address. The producer thread process does not block or wait for the TCP connection to be established. A consumer thread process is activated upon the occurrence of an event on the TCP connection. The consumer thread process includes retrieving information from the TCP connection and recording statistics related to the information.

Abstract: A system and method are disclosed for providing enhanced computer network security by scanning data, specifically electronic mail messages, sent to the network before the data is received and transmitted by the network's mail server. An e-mail message is received by a computer network configured to receive data and is checked as the data is received and before it is transmitted to a node on the computer network. The method includes determining whether an external source is attempting to establish a mail connection with the computer network configured to include a data scanning device that recognizes one or more data transfer protocols. Once the data is received the data scanning device begins evaluating the data by first determining whether the data is formatted according to one of the recognized protocols. The data scanning device begins scanning the data for acceptable content and format according to a rule set established by one of the recognized protocols.

Abstract: A network computer system providing for the fault tolerant storage and retrieval of data files includes a client system connected to a data communication network that may source a first data transfer request to said data communication network for the transfer or retrieval of data. A first server system, including first medium for storing data files, is connected to the data communication network so as to be responsive to first data transfer requests. A second server system, including second medium for storing data files is also connected to said data communication network to also be responsive to first data transfer requests.