D-Link DSL-G2452GR User Manual page 81

Section 4 - Configuration
The First Phase
Encryption mode Select the encryption mode to use. The default is
CBC.
First phase Choose the encryption algorithm to use for the first
encryption
phase.
algorithm
Hashing mode Choose the hashing mode to use for the first phase.
Size of hash Select the hash size to use.
Hashing algorithm Select the hash function to use from MD5, SHA1,
and SHA2 (recommended).
First phase
Specify the DHgroup type for the first phase from the
DHgroup type
drop-down list.
IKE-SA lifetime
Enter a value between 60 and 864000 seconds.
IKE version
Select either IKE version 1 or 2. IKEv2 is recommended.
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