Stops doing reverses for a few hours

Barry Margolin barry.margolin at level3.com
Mon Oct 6 15:41:58 UTC 2003


In article <blrv3u$2ded$1 at sf1.isc.org>, Tuc  <tuc at ttsg.com> wrote:
>> 
>> In article <bln51n$1erc$1 at sf1.isc.org>, Tuc  <tuc at ttsg.com> wrote:
>> >	We have had a few servers that just seem to stop doing reverse
>> >lookups for a few hours for all IPs in our netblock that aren't in cache.
>> 
>> My guess is that something is blocking the 215.231.105.163 server from
>> talking to the authoritative servers for your reverse domain.  Maybe
>> there's a packet filter somewhere, or an allow-query statement on the
>> servers.
>> 
>	(216.231.105.163).
>
>	That would make sense, but the first authoritative server is 
>216.231.111.14, in the same /19 and the second is 209.51.161.86 which is
>offsite. We have checked all packet filers and allow-query and it should
>not be a problem. PLUS, the 2nd major time it happened, it stopped almost
>exactly 4 hours after it started with NO changes anywhere in our 
>configurations or network.

Have you tried using a sniffer to see the traffic between the servers when
this happens?

-- 
Barry Margolin, barry.margolin at level3.com
Level(3), Woburn, MA
*** DON'T SEND TECHNICAL QUESTIONS DIRECTLY TO ME, post them to newsgroups.
Please DON'T copy followups to me -- I'll assume it wasn't posted to the group.


More information about the bind-users mailing list