Wireshark · Wireshark-users: [Wireshark-users] isakmp decryption

[Suresh Kumar <sureshkumarr.s@xxxxxxxxx>]

hi,

i need to decrypt the isakmp or ikev1 packets. I know the keys,algorithms all the required stuff.i know wireshark has the capable to do that. But under Preferences->protocol preferences-> ISAKMP -> Logfile name option is there. But i dont know how to fill this.

can some one help to decrypt the isakmp/ikev1 packets.

thanks in advance 
suresh