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_msdc.domain.com DNS zone

Posted on 2004-09-15
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Last Modified: 2012-06-27
I have just created a new domain and new dns zone in my company.
It has created along with the "domain.com" zone a "_msdc.domain.com" zone.

I understand this zone is specially created to allow machines to find services and domain controllers.

When I have looked on our existing domains whch are all W2K servers and workstations I cant see a _msdc zone.

Why is this and does this mean i dont need it??

What would be the reason for not having it?
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Question by:STEVEO5
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oBdA earned 300 total points
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You definitely need it, ad if it's missing, it's usually incorrect DNS settings.
On your DC/DNS, and on all of your domain members, make sure the DC's address *only* is listed in the TCP/IP properties (be that via DHCP or static; do NOT use 127.0.0.1 on the DNS itself!). If you have additional DCs with DNS running, let them point to your first DC/DNS as primary, to themselves as secondary DNS server. The first one should only point to itself. That makes sure your internal lookups work correctly.
For internet access, delete the root zone (if present; it's the single dot: ".") on your DNS in your forward lookup zones. Then open the properties page of your DNS server and configure forwarders to point to your ISP's DNS. The forwarders section is the *only* entry in your network where your ISP's DNS should be listed.
In addition, make sure that in the properties of your AD domain name in DNS, Dynamic Updates are enabled (in the reverse zone as well, if you have created one).

Frequently Asked Questions About Windows 2000 DNS and Windows Server 2003 DNS
http://support.microsoft.com/?kbid=291382

Best practices for DNS client settings in Windows 2000 Server and in Windows Server 2003
http://support.microsoft.com/?kbid=825036

Windows 2000 DNS and Active Directory Information and Technical Resources
http://support.microsoft.com/?kbid=298448

HOW TO: Troubleshoot DNS Name Resolution on the Internet in Windows 2000
http://support.microsoft.com/?kbid=316341

HOW TO: Configure DNS for Internet Access in Windows 2000
http://support.microsoft.com/?kbid=300202

Setting Up the Domain Name System for Active Directory
http://support.microsoft.com/?kbid=237675

Troubleshooting Common Active Directory Setup Issues in Windows 2000
http://support.microsoft.com/?kbid=260371

How to Verify the Creation of SRV Records for a Domain Controller
http://support.microsoft.com/?kbid=241515

How Domain Controllers Are Located in Windows
http://support.microsoft.com/?kbid=247811

How Domain Controllers Are Located in Windows XP
http://support.microsoft.com/?kbid=314861

HOW TO: Use the Network Diagnostics Tool (Netdiag.exe) in Windows 2000
http://support.microsoft.com/?kbid=321708

DCDiag and NetDiag in Windows 2000 Facilitate Domain Join and DC Creation
http://support.microsoft.com/?kbid=265706

Do not install the Support Tools from your installation CD, some tools were updates by the Service Packs. Here's the current version:
Windows 2000 SP4 Support Tools
http://www.microsoft.com/windows2000/downloads/servicepacks/SP4/supporttools.asp

SRV Resource Records May Not Be Created on Domain Controller
http://support.microsoft.com/?kbid=239897
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