host resolving to an IP not in the zone

Kevin Darcy kcd at daimlerchrysler.com
Thu Mar 8 18:21:33 UTC 2001


The bogus answer was non-authoritative, meaning that it got cached from
somewhere. You could set "host-statistics yes" and next time it happens,
dump the cache. Then you'll be able to tell exactly where the answer came
from. Be aware, however, that host-statistics will increase your memory
usage...


-Kevin

josephc wrote:

> Ok, this is just weird:
>
> > nslookup -q=a health.healthcommunities.com dns.etards.net
> Server:  h0000c5785fb6.ne.mediaone.net
> Address:  66.31.249.69
>
> Non-authoritative answer:
> Name:    health.healthcommunities.com
> Address:  192.168.1.10
>
> But a lookup against the master server:
>
> > nslookup -q=a health.healthcommunities.com health.healthcommunities.com
> Server:  health.healthcommunities.com
> Address:  63.127.8.210
>
> Name:    health.healthcommunities.com
> Address:  63.127.8.210
>
> dns.etards.net/h0000c5785fb6.ne.mediaone.net is not in anyway related to
> healthcommunities.com, it just happens to be another DNS server I manage.
>
> The zone for healthcommunities.com contains absolutly no reference to
> 192.168.1.10. However, that IP is the internal address for
> health.healthcommunities.com in its home network. But again, that IP
> address is not stated anywhere in any DNS records and it never, ever has
> :)
>
> So does anyone know where it could be coming from? It does not appear to
> be cached info, and so far it only happens to queries against that DNS
> server, but I am worried that it could be happening elsewhere and I just
> don't know it.
>
> thanks
>
> -joe





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