AirLive RS-2000 - Manual (Page 188)

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Define the required fields of VPN:
RSA:
!
A public-key cryptosystem for encryption and authentication.
Preshared Key:
!
The IKE VPN must be defined with a Preshared Key. The Key may be up to 128
bytes long.
ISAKMP (Internet Security Association Key Management Protocol):
!
An extensible protocol-encoding scheme that complies to the Internet Key
Exchange (IKE) framework for establishment of Security Associations (SAs).
Main Mode:
!
This is another first phase of the Oakley protocol in establishing a security
association, but instead of using three packets like in aggressive mode, it uses six
packets.
Aggressive mode:
!
This is the first phase of the Oakley protocol in establishing a security association
using three data packets.
AH (Authentication Header):
!
One of the IPSec standards that allows for data integrity of data packets.
ESP (Encapsulating Security Payload):
!
One of the IPSec standards that provides for the confidentiality of data packets.