wierd bind problem.... queries not answered...
Mark.Andrews at nominum.com
Mark.Andrews at nominum.com
Fri Dec 22 22:20:30 UTC 2000
>
>
> I'm having a really wierd problem... When my Debian 2.2 box running bind
> 8.2.2 p7 is rebooted, named restarts and sends out priming queries, and
> never gets any answer. So I would type something like:
>
> nslookup debian.org
>
> and I would get:
>
> Server: localhost
> Address: 127.0.0.1
>
> *** localhost can't find debian.org: No response from server
>
> Now, I'm monitoring all this with
>
> tcpdump -nx -s 128 ip and port 53
>
> And I can see the requests go out, but nothing ever comes back in, from
> either the forward servers or the fail-over root servers. I can ping
> these servers successfully while this is going on.
>
> Now THIS is where it gets strange. If I restart bind with
>
> /etc/init.d/bind stop
> /etc/init.d/bind start
>
> (and no other changes)
>
> SOMETIMES it will start working again and everything looks as it should,
> including the tcpdump output. On the second restart it usually works.
> We only have a packet firewall, not a stateful one, so that's not the
> issue...
>
> (we are making the request on a non-priveldged port)
>
> The only thing I can think of is sending mal-formed queries out, but even
> those should get some kind of response. The other possibility is that
> this is a hardware problem, as this first appeared after a power outage
> during a lightning storm, but two identical machines (va linux 2 by
> 2s) are doing the exact same thing. I also tried switching from my
> home-compiled verions to the offical Debian binaries.
>
> Any ideas? Need more information?
>
> Thanks!
>
> -Jeff
Think about it.
If the packets are leaving the server what is stopping them
reaching the root server or stopping the answers getting
back.
Do you have a fire wall?
Are you too many hops from the root servers?
Do you have the correct addresses in the hints?
Do you have the correct addresses for the forwarders?
Mark
--
Mark Andrews, Nominum Inc.
1 Seymour St., Dundas Valley, NSW 2117, Australia
PHONE: +61 2 9871 4742 INTERNET: Mark.Andrews at nominum.com
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