Prestige 334 User’s Guide

An added feature of the ESP is payload padding, which further protects communications by concealing the size of the packet being transmitted.

Table 46 AH and ESP

ESP

AH

 

 

DES (default)

MD5 (default)

Data Encryption Standard (DES) is a widely used method

MD5 (Message Digest 5) produces a 128-

of data encryption using a secret key. DES applies a 56-bit

bit digest to authenticate packet data.

key to each 64-bit block of data.

 

3DES

SHA1

Triple DES (3DES) is a variant of DES, which iterates three

SHA1 (Secure Hash Algorithm) produces

times with three separate keys (3 x 56 = 168 bits),

a 160-bit digest to authenticate packet

effectively doubling the strength of DES.

data.

Select DES for minimal security and 3DES for maximum.

Select MD5 for minimal security and SHA-

 

1 for maximum security.

15.3 My IP Address

My IP Address is the WAN IP address of the Prestige. If this field is configured as 0.0.0.0, then the Prestige will use the current Prestige WAN IP address (static or dynamic) to set up the VPN tunnel. The Prestige has to rebuild the VPN tunnel if the My IP Address changes after setup.

15.4 Secure Gateway Address

Secure Gateway Address is the WAN IP address or domain name of the remote IPSec router (secure gateway).

If the remote secure gateway has a static WAN IP address, enter it in the Secure Gateway Address field. You may alternatively enter the remote secure gateway’s domain name (if it has one) in the Secure Gateway Address field.

You can also enter a remote secure gateway’s domain name in the Secure Gateway Address field if the remote secure gateway has a dynamic WAN IP address and is using DDNS. The Prestige has to rebuild the VPN tunnel each time the remote secure gateway’s WAN IP address changes (there may be a delay until the DDNS servers are updated with the remote gateway’s new WAN IP address).

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Chapter 15 VPN Screens