[ntp:questions] IPv6 vs IPv4 look-ups (Was: Re: http://www.ntp.org/ => a blank page?)
Steve Kostecke
kostecke at ntp.org
Thu Mar 5 13:42:14 UTC 2009
On 2009-03-05, Martin Burnicki <martin.burnicki at meinberg.de> wrote:
> The IPv4 address is used only after the IPv6 address has timed out, even
> though (as far as I understand it) the DNS server first returns an IPv4
> address, then an IPv6 address:
>
> # host support.ntp.org
> support.ntp.org has address 204.152.184.138
> support.ntp.org has IPv6 address 2001:4f8:0:2::23
On my LAN I see:
$ host support.ntp.org
support.ntp.org A 204.152.184.138
To resolve the IPv6 address:
$ aaaa support.ntp.org
support.ntp.org AAAA 2001:4F8:0:2:0:0:0:23
Both 'host' and 'aaaa' are a part of the Debian host package. The
version I have installed is:
||/ Name Version Description
+++-============-=============-============================================
ii host 20000331-9 utility for querying DNS servers
If it matters I run a local name-server and do have a 6-to-4 tunnel.
--
Steve Kostecke <kostecke at ntp.org>
NTP Public Services Project - http://support.ntp.org/
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