Westermo MRD-3x0 - Manual (Page 127)

127 6623-3201
Perfect forward secrecy & group
In an authenticated key-agreement protocol using public key
cryptography, such as Diffie-Hellman key exchange, perfect
forward secrecy (PFS) is the property that ensures a session
key derived from a set of long-term public and private keys
will not be compromised if one of the private keys is compro-
mised in the future.
Perfect_forward_secrecy •
Check to enable perfect forward secrecy.
Diffie-Hellman Group •
Select the Diffie-Hellman Group from the drop-
down list, the options are:
DH Grp 1 (768) The 768 bit Diffie-Hellman
group.
DH Grp 2 (1024) The 1024 bit Diffie-Hellman
group.
DH Grp 5 (1536) The 1536 bit Diffie-Hellman
group.
DH Grp 14 (2048) The 2048 bit Diffie-Hellman
group.
Key lifetime (mins)
Key lifetime in minutes, default is 480 minutes.