cjac@foxtrot:/usr/src/deb/strongswan-5.1.0$ ping6 -c 5 google.com | tail -3
— google.com ping statistics —
5 packets transmitted, 5 received, 0% packet loss, time 4004ms
rtt min/avg/max/mdev = 65.235/74.957/103.039/14.122 ms

go go gadget ipsec