2.2.3.2.3.4.5 PfsGroup

The PfsGroup registry value specifies the Diffie-Hellman algorithm to be used for Quick Mode Perfect Forward Secrecy (PFS) [RFC4306]. This value MUST be of type REG_DWORD. Allowed values for this registry value are the same as those for dwPfsGroup in ROUTER_CUSTOM_IKEv2_POLICY_0. If the value is not specified for this registry value, or if this registry value is not present, the default value PFS_2048 (0x3) is assumed.