[windows2000] Re: DNS

  • From: Bill Beckett <Bill.Beckett@xxxxxxxxxx>
  • To: "'windows2000@xxxxxxxxxxxxx'" <windows2000@xxxxxxxxxxxxx>
  • Date: Tue, 29 Jun 2004 08:59:06 -0400

Would this apply to an MX record as well or just host records?


-----Original Message-----
From: Sullivan, Glenn [mailto:GSullivan@xxxxxxxxxxxxxx] 
Sent: Monday, June 28, 2004 3:37 PM
To: windows2000@xxxxxxxxxxxxx
Subject: [windows2000] Re: DNS


If the address is in a local zone, it never forwards.
 
If the address is not in a local zone, it always forwards.
 
So, if your DNS Server has a zone name "foo.com." then any request for any
host at foo.com will be resolved (or deferred, but to down-level DNS servers
only, for subdomains) locally, with no forwarders.
 
Any other domain will be forwarded.
 
Which is why you have to delete the "." zone before the forwarders will
work... if not, then every zone is a sub-domain of one of your "local"
zones, and will be resolved with recursion, rather than forwarding the
request to another server.  ie, a request to www.davidclark.com
<http://www.davidclark.com>  will be recursively deferred to the servers for
".com" which will refer to the servers for "davidclark.com" which will
return the record for www up the chain and back to the client...
 
Capish?
 

Glenn Sullivan, MCSE+I  MCDBA
David Clark Company Inc. 

 

  _____  

From: windows2000-bounce@xxxxxxxxxxxxx
[mailto:windows2000-bounce@xxxxxxxxxxxxx] On Behalf Of Bill Beckett
Posted At: Monday, June 28, 2004 3:27 PM
Posted To: Windows 2000
Conversation: [windows2000] DNS
Subject: [windows2000] DNS



Can someone definitively answer this question... 

If using forwarders on your W2K DNS server, does the forward lookup occur
first or after the DNS server fails to resolve the name?


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