External DNS ISP IP Change

Posted on 2011-09-28
Medium Priority
Last Modified: 2012-05-12
I have 2 active directory servers replicating DNS. We changed ISP and wanted to change the
DNS entries. But when I go to DNS and right click on our Domain > properties > forwarders but
there are no listings for the old ISP. Where else could they be defined?

Question by:PeckTech247
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LVL 13

Expert Comment

ID: 36716921
Sounds like you need to change DNS for your external domain which would require you to lookup the zone file with the hosting provider for your domain. Use this dig tool to determine where it lives: http://www.kloth.net/services/dig.php

Author Comment

ID: 36717026
Thanks for your quick reply. We don't host a web server or have a external domain
We only use DNS for internal stuff and to forward internet web request to the outside
world and have noticed a lag in web page DNS resolution and what to make sure
we are using the new DNS servers from our ISP. I just can find a setting for this.
Is it possible that this is located in some other location in Active directory?
If I shut down the two Active servers we get no WEB DNS resolution at all
so we know that something is pointing us to the outside world somehow.
LVL 13

Expert Comment

ID: 36717082
Ah I see, at the moment your DNS will be using root hints: http://technet.microsoft.com/en-us/library/ee649221(WS.10).aspx

You can ask your new ISP for the DNS servers IP's and add those to the forwarders list on each server instead

Accepted Solution

PeckTech247 earned 0 total points
ID: 36717703

Looking into it now. It looks like we have over 12 servers listed most with a Private 192.x.x.x
IP.  Does a DNS request have to look at all this servers before making a resolution?
If so this will explain the lag and time a web page gets resolved
LVL 33

Expert Comment

ID: 37693335
This question has been classified as abandoned and is closed as part of the Cleanup Program. See the recommendation for more details.

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