What ultimately gets white-listed is the query source IP address, IPv4 and or IPv6. This in part depends on whether the authoritative name servers of the content provider are dual stack or not.
John On 3/31/10 5:45 PM, "Dan Wing" <dw...@cisco.com> wrote: >> On Mar 31, 2010, at 3:19 PM, Dan Wing wrote: >> >>> Any host that sends its AAAA queries over IPv4 would lose >>> IPv6 connectivity. >> >> Isn't this a misdirection? >> >> I suspect it's more like: any (address family agnostic) >> clients of a dual stacked nameserver will (non?) >> deterministically lose IPv6 connectivity to DNS-determined >> destinations. >> >> ie, even if I only send DNS over IPv6 to my recursive >> nameserver, if it is dual stacked (often beyond my control), >> and for this specific query it prefers IPv4, then I will not >> get an answer for my AAAA under this proposal. > > It's likely cached by the ISP's nameserver, so it would work > fine under Igor's proposal. And even if not cached, I would > expect the content provider's authoritative DNS server to have > whitelisted both IPv4 and IPv6 addresses of the ISP's > nameservers. > > -d > ========================================= John Jason Brzozowski Comcast Cable e) mailto:john_brzozow...@cable.comcast.com o) 609-377-6594 m) 484-962-0060 w) http://www.comcast6.net ========================================= _______________________________________________ DNSOP mailing list DNSOP@ietf.org https://www.ietf.org/mailman/listinfo/dnsop
