[root@mieszko-ipfire1 ~]# tail -f /var/log/messages |grep pluto
Mar 25 17:25:58 mieszko-ipfire1 pluto[14616]: packet from 87.207.138.167:500: received Vendor ID payload [XAUTH]
Mar 25 17:25:58 mieszko-ipfire1 pluto[14616]: packet from 87.207.138.167:500: ignoring Vendor ID payload [Cisco-Unity]
Mar 25 17:25:58 mieszko-ipfire1 pluto[14616]: packet from 87.207.138.167:500: received Vendor ID payload [Dead Peer Detection]
Mar 25 17:25:58 mieszko-ipfire1 pluto[14616]: "mieszkoipodtouchfour"[2] 87.207.138.167 #6: responding to Main Mode from unknown peer 87.207.138.167
Mar 25 17:25:59 mieszko-ipfire1 pluto[14616]: "mieszkoipodtouchfour"[2] 87.207.138.167 #6: NAT-Traversal: Result using RFC 3947: peer is NATed
Mar 25 17:27:09 mieszko-ipfire1 pluto[14616]: "mieszkoipodtouchfour"[2] 87.207.138.167 #6: max number of retransmissions (2) reached STATE_MAIN_R2
Mar 25 17:27:09 mieszko-ipfire1 pluto[14616]: "mieszkoipodtouchfour"[2] 87.207.138.167: deleting connection "mieszkoipodtouchfour" instance with peer 87.207.138.167 {isakmp=#0/ipsec=#0}