Re: Yahoo and IPv6

[Matthew Kaufman <matthew () matthew at>]

On 5/14/2011 6:41 PM, Jima wrote:
> On 2011-05-14 13:10, Matthew Kaufman wrote:
> > On 5/14/2011 10:19 AM, Cameron Byrne wrote:
> > > Ipv6-only is a highly functional reality when enabled with
> > > nat64/dns64, there are several empirical accounts on the web.
> >
> > For a version of "highly functional" that does not include Skype,
> > BitTorrent, SIP phones, and anything Flash Player app using RTMFP to
> > reach peers, sure.
>
> 1. There are SIP phones that support IPv6, e.g., 
> http://wiki.snom.com/Networking/IPv6

Sure, but NAT64 doesn't let SIP phones on an IPv6-only network talk to 
SIP phones on an IP4-only network.

> 2. Exactly whose fault is it that RTMFP can't reach peers via IPv6? 
> (Granted, I'm not sure RTMFP is the best argument for your point 
> anyway, since apparently symmetric NAT monkey-wrenches it, too: 
> http://forums.adobe.com/message/3602495 )

RTMFP can reach peers via IPv6... but it can't talk between an IPv6-only 
peer that is behind a NAT64 and an IPv4-only peer.

And that would be the fault of NAT64, which for all of the applications 
I mentioned (and more) made the seriously wrong assumption that every 
IPv4 address is looked up in a DNS server.

Matthew Kaufman