Security

Understanding Implications of DNS Zone Provisioning

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Executive Summary

DNS is a critical component of the Internet. This paper takes a comprehensive look at the provisioning of Internet domains and its impact on the availability of various services. To gather data, it sweeps 60% of the Internet's domains for zone transfers. 6.6% of them allow to transfer their complete information. It finds that carelessness in handling DNS records can lead to reduced availability of name servers, email, and Web servers. It also undermines anti-spam efforts and the efforts to shut down phishing sites or to contain malware infections.

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