DNS Server Problem When Dynamic Updates Occur with Conflicting Entries (258019)

The information in this article applies to:

Microsoft Windows 2000 Server

This article was previously published under Q258019

SYMPTOMS

Your Windows 2000-based Domain Name System (DNS) server may generate an "access violation" error and cease to function after it receives a dynamic update.

CAUSE

This behavior can occur if a CNAME is in conflict with the A record, causing the access violation.

RESOLUTION

To resolve this problem, obtain the latest service pack for 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

STATUS

Microsoft has confirmed that this is a problem in the Microsoft products that are listed at the beginning of this article.

This problem was first corrected in Windows 2000 Service Pack 1.

MORE INFORMATION

The problem occurs only if the following sequence of events and conditions occurs:

An A record exists for a domain (for example, the A record is DOM1.DOMAIN in a domain named DOM1.DOMAIN).
A single update packet is received that:
- Adds an A record for DOM2.DOMAIN and adds a CNAME record for DOM1.DOMAIN.
- Points to DOM2.DOMAIN.

Modification Type:	Minor	Last Reviewed:	9/23/2005
Keywords:	kbHotfixServer kbQFE kbbug kbDNS kbfix kbWin2000SP1Fix KB258019