Microsoft KB Archive/288176

= Event 5509 Is Reported in the DNS Log of Event Viewer =

Article ID: 288176

Article Last Modified on 2/21/2007

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APPLIES TO


 * Microsoft Windows 2000 Server
 * Microsoft Windows 2000 Advanced Server

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This article was previously published under Q288176



SYMPTOMS
The following event ID 5509 message is often reported in the DNS log of Microsoft Event Viewer:

Event 5509

(Warning) DNS_EVENT_BAD_UPDATE_PACKET

DNS Server encountered invalid UPDATE message from %1. Packet was rejected. The IP address of the specific client that was rejected is shown in the event.

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Event 5509 (Warning)

The DNS server encountered an invalid DNS update message from &quot;IP&quot;. The packet was rejected.



CAUSE
This issue can occur if you are using a computer that is running Windows 95, Windows 98, or Windows 98 Second Edition, and the computer name includes special characters, such as a number sign (#), an ampersand (@), or a dollar sign ($). You can use the characters in computer names when you use Windows 95 and Windows 98, but Windows 2000 DNS only supports the en dash character (-) and the underscore character (_), by default. If your computer name includes a different special character, the DNS server rejects the name registration in DNS.



RESOLUTION
To resolve this issue, use either of the following methods:
 * Find the computer name that has the unaccepted special character, and then change the name.

NOTE: This method is recommended.

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 * Configure DNS so that it allows all names:
 * Start the DNS snap-in on the server.
 * Right-click the server and click Properties.
 * Click the Advanced tab, and then enter All Names in the Name Checking box.

Additional query words: Event 9999

Keywords: kbdns kberrmsg kbprb KB288176

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