Netopia 2200 series Software User's Manual page 323

route. Path through a network from one node to another. A large internet-
work can have several alternate routes from a source to a destination.
routing table. Table stored in a router or other networking device that
records available routes and distances for remote network destinations.
-----S-----
SA Encrypt Type. SA Encryption Type refers to the symmetric encryption
type. This encryption algorithm will be used to encrypt each data packet. SA
Encryption Type values supported include DES and 3DES .
SA Hash Type. SA Hash Type refers to the Authentication Hash algorithm
used during SA negotiation. Values supported include MD5 SHA1 . N/A will
display if NONE is chose for Auth Protocol.
Security Association. From the IPSEC point of view, an SA is a data struc-
ture that describes which transformation is to be applied to a datagram and
how. The SA specifies:
• The authentication algorithm for AH and ESP
• The encryption algorithm for ESP
• The encryption and authentication keys
• Lifetime of encryption keys
• The lifetime of the SA
• Replay prevention sequence number and the replay bit table
An arbitrary 32-bit number called a Security Parameters Index (SPI), as well
as the destination host's address and the IPSEC protocol identifier, identify
each SA. An SPI is assigned to an SA when the SA is negotiated. The SA can
be referred to by using an SPI in AH and ESP transformations. SA is unidirec-
tional. SAs are commonly setup as bundles, because typically two SAs are
required for communications. SA management is always done on bundles
(setup, delete, relay).
serial communication. Method of data transmission in which data bits are
transmitted sequentially over a communication channel
SHA-1. An implementation of the U.S. Government Secure Hash Algorithm;
a 160-bit authentication algorithm.
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