Dns timeout windows 2003 server

Here are some problems that you might encounter with the Windows DNS service and the steps that you need to take to correct them. These extensions allow for the transfer of DNS packets in excess of bytes, which was the restriction imposed by RFC When Windows Server contacts a remote DNS server, this capability is negotiated and enabled if both ends support it, resulting in DNS record sets of a size greater than bytes.

Unfortunately, some firewalls have trouble with this enhancement as they are configured to drop DNS packets in excess of bytes. As you can imagine, this will result in significant problems with DNS servers on opposite sides of the firewall! It will drop back to using the RFC defined limits. Having a problem with a Windows Server If run nslookup www.

Any ideas on what to check? Improve this question. Add a comment. Active Oldest Votes. It looks like you can not reach 8. Improve this answer. Matthieu Cerda Matthieu Cerda 3 3 bronze badges. Your right it was the router I rebooted its now fine. This means that with default settings, a R2 server will be able to query at most 2 conditional forwarders. There will not be enough time to arrive to use the third conditional forwarder.

At the eighth second, RecursionTimeout expires so we'll not reach the point where the third conditional forwarder is queried which would have happened after 5.

DNS server with IP address On a network capture we would see the following Network Monitor output note DNS: The recursion timeout must be greater than the forwarding timeout. DNS: The forwarding timeout value should be 2 to 10 seconds. Skip to main content. This browser is no longer supported. Download Microsoft Edge More info. Contents Exit focus mode. IPv4 Address.

Any Name Error response by any of the DNS servers will cause the process to stop - client doesn't retry with the next server if the response was negative. Client tries new servers only if the previous are unreachable. In this scenario, the client is then trying to query mostly the first DNS server, and the secondary once.

If the only reachable server is in position 4 or higher, we have an expected delay of at least 4 seconds after the original query before actually trying it. This can cause issues if the application that has requested the DNS resolution has an application resolution timeout lower than this value.