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Group:  English: Windows Server » microsoft.public.windows.server.dns
Thread: DNS Queries from client to server append domain.

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DNS Queries from client to server append domain.
cericme[ at ]gmail.com 4/30/2007 4:53:34 PM
Hello, this is really bugging me and I can't figure out how to fix
this.

I host no internal sites. I'm saying that from the outset.

Recently I've been having some DNS issues I finally found the
culprit. To long of a timeout and the appending of the domain to
every query.

If I do an nslookup on say www.google.com the first dns request it
makes is: (note: domain is infrainc.infrainc.com, I didn't set the
name up...)

www.google.com.infrainc.infrainc.com

then it will strip one of the infrainc's to make the request:

www.google.com.infrianc.com

then we finally get to:

www.google.com

The original request I wanted looked up. By the time the response
package of the original request that I want gets pack the client has
timed out. (I looked at the packets using Ethereal.)

I can "fix" this by shortening timeout on the dns for forward request
but my lotus person needs the longer timeouts for mail to get
delivered, which I won't pretend to understand that one.

I can't seem to find any settings to tell windows that I do not want
to append the domain to the query I just want to do it as it is.

To break it down I either want to:

A) Stop the clients from appending the domain or
B) have the DNS not forward any request with the domain name (Ex.
www.google.com.infrainc.infrainc.com has no internal site so it will
send a fail instead of forwarding it to the forwarders or using the
root hints to try to find it)

Option A would be ideal if possible because it also lowers network
traffic.

Thank you in advance.

Re: DNS Queries from client to server append domain.
"Kevin D. Goodknecht Sr. [MVP]" <admin[ at ]nospam.WFTX.US> 5/1/2007 12:50:06 AM
Read inline please.

In news:1177952014.851822.90050[ at ]o5g2000hsb.googlegroups.com,
cericme[ at ]gmail.com <cericme[ at ]gmail.com> typed:
[Quoted Text]
> Hello, this is really bugging me and I can't figure out how to fix
> this.
>
> I host no internal sites. I'm saying that from the outset.
>
> Recently I've been having some DNS issues I finally found the
> culprit. To long of a timeout and the appending of the domain to
> every query.
>
> If I do an nslookup on say www.google.com the first dns request it
> makes is: (note: domain is infrainc.infrainc.com, I didn't set the
> name up...)
>
> www.google.com.infrainc.infrainc.com
>
> then it will strip one of the infrainc's to make the request:
>
> www.google.com.infrianc.com
>
> then we finally get to:
>
> www.google.com
>
> The original request I wanted looked up. By the time the response
> package of the original request that I want gets pack the client has
> timed out. (I looked at the packets using Ethereal.)
>
> I can "fix" this by shortening timeout on the dns for forward request
> but my lotus person needs the longer timeouts for mail to get
> delivered, which I won't pretend to understand that one.
>
> I can't seem to find any settings to tell windows that I do not want
> to append the domain to the query I just want to do it as it is.
>
> To break it down I either want to:
>
> A) Stop the clients from appending the domain or
> B) have the DNS not forward any request with the domain name (Ex.
> www.google.com.infrainc.infrainc.com has no internal site so it will
> send a fail instead of forwarding it to the forwarders or using the
> root hints to try to find it)
>
> Option A would be ideal if possible because it also lowers network
> traffic.

If you stop the Client from appending the domain name, you will no longer be
able to resolve NetBIOS names with DNS. What you need to do is stop the
client from appending the parent suffixes. You can do this by clearing the
box, "Append parent suffixes of the Primary DNS suffix" or by creating a
custom DNS suffix search list that contains only the local domain suffix.
Both of these can be achieved in Group Policies located here:
Computer Configuration
-Administrative templates
-Network
-DNS Client



--
Best regards,
Kevin D. Goodknecht Sr. [MVP]
Hope This Helps
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