Resilient domain name service (DNS) resolution when an authoritative name server is unavailable
US10721117B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 7, 2017 |
| Grant date | Jul 21, 2020 |
| Priority date | — |
| Expiry date | Jan 2, 2038 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L61/45
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A resolution resiliency application performs robust domain name system (DNS) resolution. In operation, the resolution resiliency application determines that an authoritative name server that is responsible for a domain name specified in a DNS query is unavailable. In response to determining that the authoritative name server is unavailable, the resolution resiliency application performs operation(s) that modify one or more DNS records stored in a cache based on one or more resiliency policies associated with the authoritative name server. The resolution resiliency application then generates a DNS response to the DNS query based on a DNS record stored in the modified cache. Notably, the disclosed techniques increase the likelihood of providing clients with DNS responses that accurately provide requested information.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.