D-Link DIR-840 User Manual page 50

Section 3 - Setup
Phase1 Mode:
Choose if you want to use a main or aggressive mode.
NAT-T Enable: Enable or Disable the NAT-T option.
Keep Alive: Enable or Disable Keep Alive protocols.
DPD:
Choose whether or not to detect dead peers, then set the
amount of time in seconds before disconnect of dead peers.
You can also set a delay time in second before release.
DH Group: Enable or Disable the DH Group option using the drop-
down menu.
IKE Proposal Use this area to Enable IKE Proposals. Then determine
Settings:
encryption and authentication types from the drop-down
menus.
IKE Lifetime: Enter the amount of time in seconds that the Phase 1 keys
should last.
PFS Enable: Choose if you want to use Perfect Forward Secrecy. PFS is
an additional security protocol.
PFS DH Group: Choose a PFS DH Group from the drop-down menu.
IPSEC Proposal Use this area to choose the encryption and authentication
List:
methods for IPSec proposals by choosing from the drop-
down menus.
IPSec Lifetime: Enter the amount of time in seconds that the Phase 2 keys
should last.
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