Invention Grant
- Patent Title: Resilient domain name service (DNS) resolution when an authoritative name server is degraded
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Application No.: US15881596Application Date: 2018-01-26
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Publication No.: US11025482B2Publication Date: 2021-06-01
- Inventor: Shumon Huque , Burton S. Kaliski, Jr. , Eric Osterweil , Frank Scalzo , Duane Wessels , Glen Wiley
- Applicant: Verisign, Inc.
- Applicant Address: US VA Reston
- Assignee: Verisign, Inc.
- Current Assignee: Verisign, Inc.
- Current Assignee Address: US VA Reston
- Agency: Artegis Law Group, LLP
- Main IPC: H04L12/24
- IPC: H04L12/24 ; H04L29/12 ; H04W24/04 ; H04L29/14

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.
Public/Granted literature
- US20180375716A1 RESILIENT DOMAIN NAME SERVICE (DNS) RESOLUTION WHEN AN AUTHORITATIVE NAME SERVER IS DEGRADED Public/Granted day:2018-12-27
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