Windows 2008 r2 dns cache

Are you seeing event ID ? Maybe further monitoring is required. That allows it to always work regardless of the support of the other DNS servers. Bummer, I thought that was a good idea. EDNS0 allows increased query efficiency. Therefore what occurs are multiple queries to get the one answer. There is no reason it should be disabled.

It tries EDNS0 first, then drops to the legacy. If you can answer the following questions that I've previously asked, your responses will be very helpful with a diagnosis.

For your convenience:. And as suggested by microsoft earlier, we have blocked few DNS Domains by creating conditional forwarders , pointing to our another domain.

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No jargon. Disabling recursion globally isn't a configuration change that should be taken lightly as it means that the DNS server can't resolve any DNS names on zones that aren't held locally. This requires some careful DNS planning. For example, clients cannot typically be pointed directly at such servers.

The decision to disable recursion or not must be made based on what role the DNS server is meant to do within the deployment.

If the server is meant to recurse names for its clients, recursion cannot be disabled. If the server is meant to return data only out of local zones and is never meant to recurse or forward for clients, then recursion may be disabled.

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