Motorola 7.7.4 manual 331

SPI . The Security Parameter Index is an identifier for the encryption and authentication algorithm and key. The SPI indi- cates to the remote firewall the algorithm and key being used to encrypt and authenticate a packet. It should be a unique num- ber greater than 255.

STATEFUL. The Motorola Netopia® Gateway monitors and maintains the state of any network transaction. In terms of net- work request-and-reply, state consists of the source IP address, destination IP address, communication ports, and data sequence. The Motorola Netopia® Gateway processes the stream of a network conversation, rather than just individual packets. It verifies that packets are sent from and received by the proper IP addresses along the proper communication ports in the correct order and that no imposter packets interrupt the packet flow. Packet filtering monitors only the ports involved, while the Motorola Netopia® Gateway analyzes the continuous conversation stream, preventing session hijacking and denial of service attacks.

static route. Route entered manually in a routing table.

subnet mask. A 32-bit address mask that identifies which bits of an IP address represent network address information and which bits represent node identifier information.

synchronous communication. Method of data communica- tion requiring the transmission of timing signals to keep peers synchronized in sending and receiving blocks of data.

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telnet. IP protocol that lets a user on one host establish and use a virtual terminal connection to a remote host.

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