Motorola Netopia 2200 Series User Manual page 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.
-----T-----
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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