netdiag

The netdiag utility performs a variety of network connectivity tests, including a DNS test. The netdiag /test:DNS command iterates over each active network adapter and checks whether the hostname has an A record in the domain specified by the domain suffix for the adapter. If you receive an error message for the DNS test, you should run netdiag /test:DNS /debug, which will produce verbose output and help pinpoint the cause of the failure.

If you run netdiag /test:DNS on a domain controller and receive errors, you can run it again with the /fix option to force all the records in the netlogon.dns file to be refreshed in DNS. See Chapter 8 for more details on the netlogon.dns file.

The netdiag utility is available in the Windows 2000 and Windows Server 2003 Support Tools.

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