HP Sa3110 - VPN Server Appliance Manual page 39

Encapsulation Encapsulation
Encapsulation Encapsulation
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Hewlett-Packard Company Virtual Private Networking Concepts Guide
The encapsulation can be set to either Shiva Smart Tunneling
(SST) Encapsulation or to Encapsulating Security Payload (ESP)
Encapsulation. ESP is the security portion of the IPSec standard.
SST encapsulation is recommended for data exchange between
VPN devices, as it is stronger than ESP encapsulation.
ESP (either version) should be used when you communicate
with another non–HP VPN device (such as a firewall or router)
that has implemented the ESP portion of the IPSec standard.
The ESP implementation in all HP VPN devices is tunnel mode.
However, you can use transport mode by selecting ESP (either
version), setting the ESP authentication to none, and selecting a
value for the Authentication Header (AH). Transport mode
encrypts only the payload.
SST Encapsulation (page 3-6)
ESP Encapsulation (page 3-4)
Encapsulation Overview (page 3-1)
Secure Profiles
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