5 Configuring the Security Settings iPocket232 User Guide
23-CML000293 iPocket232 Inc. 46
SPI
SPI (Security Parameters Index) is a 32-bit hexadecimal number used to identify the security
association of an IP packet. The SPI is used to look up the Encode and Authenticate Keys, and must be
the same at both ends of the tunnel. The first 256 SPI values are reserved, but you can use any number
from 100 hex up to FFFFFFFF hex as the SPI.
To enter or change the SPI:
1 Choose SPI from the Secure IP Association sub-menu.
You are prompted to enter the SPI for this tunnel in Hex digits.
2 Type the SPI (up to 8 characters long) at the prompt, and press Enter.
Network Address
The Secure IP Association Network Address is the address of the remote device. To enter or change
the Network Address:
1 Choose Network Address from the Secure IP Association sub-menu. You are prompted to
enter the IP address of the secure network.
2 Type the address at the prompt (in the format xxx.xxx.xxx.xxx) and press Enter.
Network Mask
Network Mask is the subnet mask of the network on which the remote device resides.
To enter or change the Network Mask:
1 Choose Network Mask from the Secure IP Association sub-menu. You are prompted to
enter the subnet mask of the secure network.
2 Type the network mask at the prompt (in the format xxx.xxx.xxx.xxx) and press Enter.
Network Gateway
The Secure IP Association Network Gateway is the address of the gateway of the network on
which the remote device resides. To enter or change the Network Gateway:
1 Choose Network Gateway from the Secure IP Association sub-menu.
You are prompted to enter the IP address of the secure network’s gateway.
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