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
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