dns.cache Best Practices

Greetings all,

Our DNS servers have been recently configured to forward external lookups to
our ISPs. The Root Hints tabs have been emptied on all DNS servers and
dns.cache have been renamed so the servers wouldn't automatically populate
the Root Hints tab. Our DNS is Active Directory Integrated.

When our DNS servers start, they list two events 1000 and 1004, as we've
renamed dns.cache and the server can't find the file. According to the
internal help, if a server is a root DNS server for an organization its Root
Hints tab should be empty.

If all internal DNS servers in the organization are also DCs, and they are
hosting the same root zone, are they are all considered to be the root for
the zone? What is considered the Best Practice regarding the contents of the
Root Hints tabs?

TIA,

- S

"SB" <> wrote in message
news:64D1AA82-8390-473A-AA7B-...
> Greetings all,
>
> Our DNS servers have been recently configured to forward external lookups
> to
> our ISPs. The Root Hints tabs have been emptied on all DNS servers and
> dns.cache have been renamed so the servers wouldn't automatically populate
> the Root Hints tab. Our DNS is Active Directory Integrated.
>
> When our DNS servers start, they list two events 1000 and 1004, as we've
> renamed dns.cache and the server can't find the file. According to the
> internal help, if a server is a root DNS server for an organization its
> Root
> Hints tab should be empty.
>
> If all internal DNS servers in the organization are also DCs, and they are
> hosting the same root zone, are they are all considered to be the root for
> the zone? What is considered the Best Practice regarding the contents of
> the
> Root Hints tabs?
>
> TIA,
>
> - S


I would just leave the Root hints in the list. Besides, if you have two
Forwarders listed, the timeout will be reached before it may ever get to the
Root hints anyway.

See if this helps to repopulate a Windows 2000 DNS. It should also work for
2003 and newer. Actually with 2003 and 2008, you click the Copy button and
specify an external DNS (such as 4.2.2.2) to populate the Root hints.

Replacing root hints with the Cache.dns fileYou may experience one or more
of the following symptoms:
http://support.microsoft.com/kb/249868

More info on EventID 1004 and 1000:
http://eventid.net/display.asp?event...ce=DNS&phase=1
http://eventid.net/display.asp?event...ce=DNS&phase=1


--
Ace

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Ace Fekay, MCT, MCITP EA, MCTS Windows 2008 & Exchange 2007, MCSE & MCSA
2003/2000, MCSA Messaging 2003
Microsoft Certified Trainer

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