User's Manual

11-3) Method 2: Aggressive mode

Aggressive is an automated method of establishing a shared security

policy and authenticated keys. A preshared key is used for mutual

identification.

Parameter Description

Perfect Forward Secure Click either the Enabled or Disabled radio

button. This feature provides a better

security; it ensures that the encryption

keys generated are not relevant to each

other.

Encryption Protocol The VPN Gateway supports two types of

encryption algorithms (DES and 3DES).

Select an appropriate encryption

algorithm. The encryption algorithm must

match the encryption algorithm in the

remote device.

Key Group Diffie-Hellman key agreement describes a

method whereby two parties, without any

prior arrangements, can agree upon a

secret key that is known only to them. The

VPN Gateway supports two versions of

Diffie-Hellman (Group 1 and Group 2).