IPv6 DNS server addresses on WinXP

Kevin Loch kloch at kl.net
Tue May 26 21:23:46 CEST 2009

Jeroen Massar wrote:
> Steven Lisson wrote:
>> Hi,
>> I have a bit of a query about IPv6 on WinXP, ipconfig /all shows the
>> following for DNS servers, but does not appear to work, I know the
>> addresses are depreciated, however, if the above commands show them,
>> they should at least be used right?
>> DNS Servers . . . . . . . . . . . : fec0:0:0:ffff::1%1
>>                                     fec0:0:0:ffff::2%1
>>                                     fec0:0:0:ffff::3%1
> I have never understood why Microsoft configures those or how one could
> even remove them, they seem to be always there and are dormant.
> The latter is logical though:
>    Windows XP's DNS resolver does not support DNS queries over IPv6.
> (IPv6 transport that is, it does do AAAA queries)
> Complain to Microsoft for that.... (they will most likely tell you to
> upgrade to Windows 7 now though...)

There used to be a draft for DNS autodiscovery that specified those
addresses.  I used to see frequent DNS queries to those IPs when
I ran a 6to4 relay.  As a courtesy I added them to my relay and
ran a DNS resolver on them.  I'm not sure if it was WinXP but
something was doing DNS queries over IPv6 to those addresses.

- Kevin

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