Prestige 792H User’s Guide
VPN Screens
14-19
14.12.1
Security Parameter Index (SPI)
An SPI is used to distinguish different SAs terminating at the same destination and using the same IPSec
protocol. This data allows for the multiplexing of SAs to a single gateway. The
SPI
(Security Parameter
Index) along with a destination IP address uniquely identify a particular Security Association (SA). The
SPI
is transmitted from the remote VPN gateway to the local VPN gateway. The local VPN gateway then uses
the network, encryption and key values that the administrator associated with the SPI to establish the tunnel.
Current ZyXEL implementation assumes identical outgoing and incoming SPIs.
14.13 Configuring Manual Key
You only configure
VPN Manual Key
when you select
Manual
in the
Key Management
field on the
VPN
IKE
screen. This is the
VPN Manual Key
screen as shown next.
Summary of Contents for Prestige 792H
Page 1: ...Prestige 792H G SHDSL 4 port Security Gateway User s Guide Version 3 40 BZ 0 March 2004...
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Page 86: ...Prestige 792H User s Guide 5 14 WAN Setup Figure 5 6 Advanced WAN Backup...
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Page 178: ...Prestige 792H User s Guide 14 8 VPN Screens Figure 14 3 VPN IKE...
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Page 221: ...Maintenance VI Part VI Maintenance This part covers the maintenance screens...
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Page 415: ...XI Part XI Appendices and Index This section provides some Appendices and an Index...
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