OK. This is basically bad behaviour... Intitiator is F20, responder is Centos6. Both set for HIPv1.
Default config. Though on the Centos server, I turned off NAT support. (and DYNDNS update)
I have two systems on the same subnet.The IPv4 addresses are public, 188.8.131.52/29. I pay $10/mo for my /26 allocation. The IPv6 addresses are public, 2607:f4b8:3:13::/64. My allocation is 2607:f4b8:3::/48.
So why if I ping6 is the client using NAT traversal???? Minimally it should be using IPv6. It is there. Worst IPv4 native. This is unacceptable behaviour. HELP????