Cradlepoint IBR600 Product Manual page 177

COR | USER MANUAL Firmware ver. 5.0.0
CRADLEPOINT
Page 4: IKE Phase 2
7.9.4
Perfect Forward Secrecy (PFS): Enabling this feature will
require IKE to generate a new set of keys in Phase 2 rather than
using the same key generated in Phase 1.
Additionally, the new keys generated in Phase 2 (with this option
enabled) are exchanged in an encrypted session. Enabling this
feature affords the policy greater security.
Key Lifetime: The lifetime of the generated keys of Phase 2 of
the IPsec negotiation from IKE. After the time has expired, IKE
will renegotiate a new set of Phase 2 keys.
Phase 2 has the same selection of Encryption, Hash, and DH
Groups as Phase 1, but you are restricted to only one DH
Group. Phase 2 and Phase 1 selections do not have to match.
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