DNS Delays Sending a Server Failure Response to a Client (824068)

SYMPTOMS

When a client computer makes a Domain Name System (DNS) request to resolve a fully qualified domain name (FQDN), the DNS server on a Windows 2000-based server waits up to 15 seconds before it sends a server failure response to the client. During this time, the DNS server does nothing else to resolve the name. This problem occurs with or without forwarders configured on the DNS server.

CAUSE

If the DNS server sends a query to a second DNS server (forwarder or root hint) to resolve the FQDN, and if the second DNS server returns a server failure response, the first DNS server ignores the response. The first DNS server repeats this response for each configured forwarder or root hint. After the recursion timeout expires (by default 15 seconds, but you can configure the timeout through the Registry), the first DNS server returns a "Server Failure" message to the client.

RESOLUTION

Hotfix Information

A supported hotfix is now available from Microsoft, but it is only intended to correct the problem that this article describes. Apply it only to systems that are experiencing this specific problem.

To resolve this problem, contact Microsoft Product Support Services to obtain the hotfix. For a complete list of Microsoft Product Support Services telephone numbers and information about support costs, visit the following Microsoft Web site:

http://support.microsoft.com/contactus/?ws=support

Note In special cases, charges that are ordinarily incurred for support calls may be canceled if a Microsoft Support Professional determines that a specific update will resolve your problem. The usual support costs will apply to additional support questions and issues that do not qualify for the specific update in question.

Prerequisites

To install this fix, you must have installed Windows 2000 Service Pack 3.

Hotfix Replacement Information

This hotfix does not replace any other hotfixes.

File Information

The English version of this fix has the file attributes (or later file attributes) that are listed in the following table. The dates and times for these files are listed in Coordinated Universal Time (UTC). When you view the file information, it is converted to local time. To find the difference between UTC and local time, use the Time Zone tab in the Date and Time item in Control Panel.

   Date         Time   Version        Size     File name
   -----------------------------------------------------
   09-Jul-2003  20:36  5.0.2195.6772  326,416  Dns.exe