Prestige 652 ADSL Security Router

25.6 Manual Setup

You only configure Menu 27.1.1.2 – Manual Setup when you select Manual in the Key Management field in Menu 27.1.1 – IPSec Setup. Manual key management is useful if you have problems with IKE key management.

25.6.1 Active Protocol

This field is a combination of mode and security protocols used for the VPN. These parameters have been discussed earlier.

Table 25-6 Active Protocol — Encapsulation and Security Protocol

MODE

SECURITY PROTOCOL

Tunnel

ESP

 

 

Transport

AH

 

 

25.6.2 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.

To edit this menu, move the cursor to the Edit Manual Setup field in Menu 27.1.1 – IPSec Setup press [SPACE BAR] to select Yes and then press [ENTER] to go to Menu 27.1.1.2 – Manual Setup.

VPN/IPSec Setup

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