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.br...@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 > > > > > > > > _______________________________________________ > bind-users mailing list > bind-users@lists.isc.org > https://lists.isc.org/mailman/listinfo/bind-users > _______________________________________________ bind-users mailing list bind-users@lists.isc.org https://lists.isc.org/mailman/listinfo/bind-users
