DNS Server Issues

Puddles · 5 Mar 2006 at 23:03

My exchange server has developed a problem with dns:

I had enabled a second gigabit interface for backup purposes and it points to an internal class c where our vtl and tape drive is located and also our vpn router for offsite backup.

The original interface has remained untouched.

If I do an nslookup on the domain it reports back the following

anydomain.com 192.168.3.3 <external ip address>

Now i've tried removing all evidence of that ip from the zone for that domain, by when I reload it it just comes back.

This issue creates a 15 second lag when accessing the server, but in addition to that, if the traffic passes thru our squid proxy, it fails.

I really don't wan't to disable the interface to the backup as it's kinda important and the tape drive in that system won't hold all the information stores.

Thanks for any help

Dan

MossyUK · 5 Mar 2006 at 23:06

quick thought - could it be due to your network card adapter order?

Puddles · 5 Mar 2006 at 23:35

tried that, no difference.

pax · 6 Mar 2006 at 14:28

Does your backup LAN have a gateway?

Is your primary network a private Class A, B or C Network?

Pax

Puddles · 6 Mar 2006 at 21:19

the backup lan has no gateway and exists in a private class c
the primary lan has a gateway and exists in a public class c

Otacon · 7 Mar 2006 at 10:18

Puddles said:
If I do an nslookup on the domain it reports back the following

anydomain.com 192.168.3.3 <external ip address>

You'll need to elaborate. Is that lookup from your internal LAN, or the public internet? Are you querying the A record of the exchange server, the MX records for the domain, or the default host of the domain? What DNS server is answering that query (in the scope of your AD forest)?