High latency.

[Jehanne]

I notice that Jehanne can talk to an IPv4 destination but cannot talk to AF's IPv6 address.

What does ping'ing AF's IPv4 result in, Jehanne? It is 104.28.16.10 - tell us what you see.

Much better results:

Pinging 104.28.16.10 with 32 bytes of data:
Reply from 104.28.16.10: bytes=32 time=33ms TTL=56
Reply from 104.28.16.10: bytes=32 time=27ms TTL=56
Reply from 104.28.16.10: bytes=32 time=30ms TTL=56
Reply from 104.28.16.10: bytes=32 time=32ms TTL=56

Ping statistics for 104.28.16.10:
    Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
    Minimum = 27ms, Maximum = 33ms, Average = 30ms