DNS forwarders "unable to resolve"

Thomas N
Thomas N used Ask the Experts™
We have DNS forwarders that have a green check mark next to them but say "unable to resolve". It also has a "OK" under Validated. What does this mean?
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Senior Systems Admin
Top Expert 2010
It means that the server's DNS configuration is not set up to allow it to determine the reverse DNS data for the IP address you used. This is pretty normal, since Windows Servers should be pointed to a DC for DNS, and if no DCs have DNS forwarders set up, they can't get Internet-based DNS data. The OK under validated means that the server can connect to the DNS server's IP and has successfully received DNS server records from it, just not the data to resolve the IP address of that server to a valid DNS record (Reverse DNS).

don't worry about it too much. Once you accept the setting change and close out the menu, the DNS server's IP should get resolved successfully by the time you next open the forwarders window.

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