For information, I have just tested successfully DPD (RFC 3706)
interoperability with OpenBSD's isakmpd (V3.6), with active monitoring
on both sides.
I am also in contact with Safenet guys to try to understand why my
implementation doesn't work with their Softremote (V 10.3.3), I would
be interested if someone have their latest version (must be 10.3.5) to
And I am also interested in any feedback about other interoperability