Wireshark · Wireshark-users: [Wireshark-users] decrypt the ISAKMP packets (IKEv1)

[Suresh Kumar <sureshkumarr.s@xxxxxxxxx>]

Hi,
How do i decrypt the ISAKMP packets. 
User guide refers, under preferneces->Protocol preferences->ISAKMP->Log file name : pass the pluto log file.

I am not sure, what kind of is pluto log file.
I am using strongswan as my IPSEC softwares. i enabled the syslogs and i have the ISAKMP keys.
How do i decrypt the isakmp messages.

please help me 
thanks
suresh