Resilient domain name service (DNS) resolution when an authoritative name server is degraded
US11025482B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 26, 2018 |
| Grant date | Jun 1, 2021 |
| Priority date | — |
| Expiry date | Jan 26, 2038 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L61/45
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
In one embodiment, a resolution resiliency application modifies domain name service (DNS) resolution. In operation, the resolution resiliency application determines that an authoritative name server has begun recovering from a degraded state or receives a flush list update from the authoritative name server. In response, the resolution resiliency application performs operation(s) that modify a query rate and/or a cache. The query rate specifies a frequency associated with DNS queries transmitted to the first authoritative name server. The cache stores DNS record(s) received from the first authoritative name server. Finally, the resolution resiliency application generates a DNS response to a DNS query based on the modified query rate and/or the modified cache.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.