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Re: Problem with name resolution - IPv6 queries are sent before IPv4.



On Wed, Apr 29, 2015 at 10:10:26AM +0200, Rafał Radecki wrote:
>    Hi Everyone :)
>    I have a quite annoying problem on several ubuntu 12.04 servers. I know
>    that I should use ubuntu mailing list but I tried that with no success :)
>    Maybe someone here will be able to help.
>    When I force a dns query using:
>    time wget --waitretry=1 [1]http://xxx.yyy -O -
>    I get (tcpdump & wireshark) the info that an AAAA IPv6 query is first send
>    to a DNS server from /etc/resolv.conf. The server is only serving IPv4

Are you saying that xxx.yyy has both a A and an AAAA record, but is only
listening on IPv4? If so, then the server is misconfigured. This is
effectively the same has having two A records and not listening to
requests on one of them.

>    queries so it responds with an error. Then an IPv4 query is sent. Overall
>    the process takes ~10 seconds every time so its painful.
[cut]
>    Any clues? :D
>    BR,
>    Rafal.
> 
> References
> 
>    Visible links
>    1. http://xxx.yyy/

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