problem resolving domains with bind9.5.0-P2

[Dave Sparro]

Based on the answer size for the query you presented, I'd focus on
looking for an upstream filter/device that is blocking answers that
are > 512 bytes.



On Wed, Sep 9, 2009 at 5:34 AM, Matthias Brehm<Matthias.Brehm at dpd.com> wrote:
> Dear all,
>
>
>
> we use bind9.5.0-P2 for the internet dns server.
>
> Sometimes we get no response for some domains, like this:
>
>
>
> ; <<>> DiG 9.3.2 <<>> cluster3.eu.messagelabs.com
>
> ;; global options:  printcmd
>
> ;; Got answer:
>
> ;; ->>HEADER<<- opcode: QUERY, status: SERVFAIL, id: 34869
>
> ;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 0, ADDITIONAL: 0
>
>
>
> ;; QUESTION SECTION:
>
> ;cluster3.eu.messagelabs.com.   IN      A
>
>
>
> ;; Query time: 166 msec
>
> ;; SERVER: 195.145.31.131#53(195.145.31.131)
>
> ;; WHEN: Fri Aug 21 11:00:01 2009
>
> ;; MSG SIZE  rcvd: 45
>
>
>
> If we ask the same question a few seconds later, we get a correct answer. (
> e.g. two out-of ten we get an error)
>
> Then we stop and start the named daemon and it works fine for a while.
>
>
>
> Any ideas?
>
> How can we debug this issue?
>
>
>
> Thanks in advance.
>
>
>
> Greets, Matthias
>
>
>
>
>
>
>
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