RE: I-D ACTION:draft-bagnulo-v6ops-6man-nat64-pb-statement-00.txt

[Christian Huitema <huitema@windows.microsoft.com>]

> Ones that are behind an ISP that not only doesn't support IPv6,
> but also has "security" in place that blocks IPv6 tunnels of
> all kinds. In this case, a dual stack host has no IPv6 capability.
>
> If that's a null set, I agree with you. But is it?

There certainly are hosts behind such firewalls. But then, firewalls don't just block tunnels. They typically do that to implement a policy. And I believe there is a very large overlap between policies that block tunnels and policies that block P2P applications. The subset of hosts that could do P2P but would not be able to to tunnels is probably very small.

-- Christian Huitema