Re: DNS addresses changing spontaneously without DHCP query

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From: Michael A. Covington (look_at_www.ai.uga.edu.for.information)
Date: 08/20/04 

Date: Fri, 20 Aug 2004 13:46:29 -0400

This sounds very close to our problem. In fact, however, that policy is not
configured. Also, "gpupdate" does not make a computer get the wrong DNS
servers.

I will continue to search through Group Policies to see if anything else
similar to this exists.

"Sharad Naik" <sharadnaik@nospam-vsnl.net> wrote in message
news:utVkKfohEHA.4092@TK2MSFTNGP10.phx.gbl...
> May be this could be because of following:
> On the Server, go to Default Domain Policies -> Administrative
> Templates->Network->DNS Client.
> There your will find policy - DNS Servers.
> Check if this is enabled and if yes, what DNS servers are entered there.
> This DNS Server policy supersedes the local settings done on the PCs -
> either manual or through DHCP.
> So if in this policy other DNS servers are defined the PCs will use these
> DNS servers. If you do ipconfig /renew, they will get back to the DNS
> servers communicated by the DHCP for, some time and then will revert back
> to
> the DNS servers specified in above policy in due course. So you can
> either
> disable this policy or enter the correct DNS servers there.
>
> Sharad
>
> "Michael A. Covington" <look@www.ai.uga.edu.for.information> wrote in
> message news:ez3VwihhEHA.556@TK2MSFTNGP10.phx.gbl...
>> Greetings,
>>
>> The PCs in our domain are supposed to use our 2 domain controllers as
> their
>> DNS servers. Our campus DHCP server tells them this, at the same time it
>> tells them their IP addresses and gateways, whenever they boot up or
>> ipconfig /renew.
>>
>> Recently, we've been coming in and finding that our PCs have reverted to
>> using a different set of DNS servers (the campus-wide ones) on their
> own --
>> without renewing their DHCP lease or (I'm told) querying the DHCP server
> in
>> any way.
>>
>> My impression was that the DHCP server was sometimes giving out the wrong
>> data. But the people who run it deny it. They say something in my
>> domain
>> is making the DNS addresses change.
>>
>> If I do an ipconfig /renew on any afflicted PC, it immediately gets the
>> correct DNS addresses from the campus DHCP server.
>>
>> What gives? What could there be, within our domain, that makes PCs
>> change
>> the DNS server addresses that they're using, without consulting the DHCP
>> server? Is the domain DNS server itself saying, somehow, "I'm not the
>> one -- you should use the ones upstream from me"?
>>
>> Many thanks!
>>
>>
>
>

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