More than half of the Internet's name servers are configured incorrectly, leaving networks vulnerable to pharming attacks and enabling servers to be used in attacks that can wipe out DNS infrastructure. This is the key finding of a survey of the Internet's domain name servers released Monday. The Measurement Factory conducted the survey for Infoblox, which sells DNS appliances.

Overall, the 2006 DNS Report Card assigned a grade of D+ for DNS security. This is the second annual survey conducted by The Measurement Factory about the state of the global DNS. We saw an increase in the pace and severity of attacks and outages resulting from bad configurations in the DNS infrastructure, says Rick Kagan, vice president of marketing for Infoblox.

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