Intermittent name resolution issues and event IDs 5501 and 6524 are logged to the DNS server event log (330574)

SYMPTOMS

You may experience intermittent name resolution issues on a Windows 2000-based computer that is configured as a secondary Domain Name System (DNS) server. The server may resolve some records but not others. When this issue occurs, the following events are logged to the DNS event log: Event ID: 5501
Source: DNS
Type: Warning
Description:
DNS Server encountered bad packet from IP Address. Packet processing leads beyond packet length. Event ID: 6524
Source: DNS
Type: Error
Description:
Invalid response from master DNS server at IPAddress during attempted zone transfer of zone. Check DNSServer and ensure that it is authoritative for this zone. This can be done by viewing or updating the list of authoritative servers for the zone. When using the DNS console, select zone ZoneName Properties at server IPAddress and click the Name Servers tab. If needed, you can add or update this server in the list there. As an alternative solution, you could also modify settings in the Zone Transfer tab to allow transfer of the zone to this and other DNS servers, where DNSServer is the name of your DNS server, IPAddress is the IP address of your master DNS server, and ZoneName is the name of your DNS zone.

CAUSE

This problem may occur if the zone transfer times out because of the load on the Windows 2000 DNS server that is acting as the primary for the zone. The primary server is not correctly handling canceled zone transfer requests. Therefore, it sends multiple zone transfer messages to the same socket, and the secondary server loads an incomplete copy of the zone.

Apply the following hotfix to Windows 2000 DNS servers that are acting as standard primaries for one or more zones.

RESOLUTION

Service Pack Information

To resolve this problem, obtain the latest service pack for Microsoft Windows 2000. For additional information, click the following article number to view the article in the Microsoft Knowledge Base:

260910 How to Obtain the Latest Windows 2000 Service Pack

Hotfix Information

A supported fix is now available from Microsoft, but it is only intended to correct the problem that is described in this article. Apply it only to computers that are experiencing this specific problem. This fix may receive additional testing. Therefore, if you are not severely affected by this problem, Microsoft recommends that you wait for the next Windows 2000 service pack that contains this hotfix.

To resolve this problem immediately, contact Microsoft Product Support Services to obtain the fix. For a complete list of Microsoft Product Support Services phone 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 typical support costs will apply to additional support questions and issues that do not qualify for the specific update in question.

The English version of this fix has the file attributes (or later) 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 tool in Control Panel.

   Date         Time   Version       Size     File name
   ----------------------------------------------------
   15-Nov-2002  16:26  5.0.2195.6130 325,904  Dns.exe