DNS authoritative server misconfiguration and countermeasure in resolver

Document Type Expired Internet-Draft (individual)
Author Kazunori Fujiwara 
Last updated 2005-07-20 (latest revision 2005-02-23)
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This Internet-Draft is no longer active. A copy of the expired Internet-Draft can be found at


This memo describes misconfigurations of DNS authoritative servers and its effect to old DNS iterative resolver servers we experienced. We recommend re-checking DNS authoritative server configuration and advise using newer iterative resolver server implementations. The recommendations made in this document are based on analysis of abnormal DNS resolver server load at large ISP resolver server which has many customers. This is not protocol issue.


Kazunori Fujiwara (fujiwara@jprs.co.jp)

(Note: The e-mail addresses provided for the authors of this Internet-Draft may no longer be valid.)