Domain name resolution using a distributed DNS network
US8423672B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 10, 2012 |
| Grant date | Apr 16, 2013 |
| Priority date | — |
| Expiry date | Jan 10, 2032 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L67/289
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.