Domain name resolution using a distributed DNS network
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United States of America Patent
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May 25, 2010
Grant Date -
May 25, 2006
app pub date -
Oct 31, 2005
filing date -
Jul 19, 2000
priority date (Note) -
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status (Latency Note)
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Abstract
A distributed DNS network includes a central origin server that actually controls the zone, and edge DNS cache servers configured to cache the DNS content of the origin server. The edge DNS cache servers are published as the authoritative servers for customer domains instead of the origin server. When a request for a DNS record results in a cache miss, the edge DNS cache servers get the information from the origin server and cache it for use in response to future requests. Multiple edge DNS cache servers can be deployed at multiple locations. Since an unlimited number of edge DNS cache servers can be deployed, the system is highly scalable. The disclosed techniques protect against DoS attacks, as DNS requests are not made to the origin server directly.
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