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114 Chapter 7 - VPN Client Tunnels
Choosing either of the top two checkboxes means that the Encapsulating
Security Payload (ESP) header will be used to encrypt and authenticate
packets.
Choosing either of the bottom two checkboxes specifies that the Authentica-
tion Header (AH) will be used to authenticate packets.
Encryption
This set of checkboxes specifies the encryption algorithm to be used for the
tunnel session.
DES (Data Encryption Standard) uses a 56-bit key to scramble the data.
3DES uses three different keys and three applications of the DES algorithm
to scramble the data.
v Note: You may choose only one authentication and one encryption method.
The default setting of ESP (MD5,DES) is recommended for most setups.
VPN Group Configuration Manual Tab
VPN Group Configuration Manual Tab
> Encryption Method
This pull-down allows the selection of the encryption algorithm for non-IKE
client sessions for this group configuration.
• If None is selected, the tunnel session will be sent in the clear in both
directions.