公开(公告)号：US20180375714A1

公开(公告)日：2018-12-27

申请号：US15670747

申请日：2017-08-07

申请人： VERISIGN, INC.

发明人： Burton S. KALISKI, JR. ,  Shumon HUQUE ,  Eric OSTERWEIL ,  Frank SCALZO ,  Duane WESSELS ,  Glen WILEY

IPC分类号： H04L12/24 ,  H04W24/04 ,  H04L29/12

摘要： In one embodiment, 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, unlike conventional techniques that may generate inaccurate DNS responses based on stale DNS records, the disclosed techniques increase the likelihood of providing clients with DNS responses that accurately provide requested information.

公开(公告)号：US20180375715A1

公开(公告)日：2018-12-27

申请号：US15881590

申请日：2018-01-26

申请人： Verisign, Inc.

发明人： Burton S. KALISKI, JR. ,  Eric OSTERWEIL ,  Duane WESSELS ,  Frank SCALZO ,  Glen WILEY ,  Shumon HUQUE

IPC分类号： H04L12/24

摘要： In one embodiment, a zone resiliency application indicates that an authoritative name server is in a degraded state. In operation, the zone resiliency application determines that the authoritative name server is in a degraded state. The zone resiliency application then generates a status record that indicates the degraded state. Subsequently, the zone resiliency application associates the status record with a domain name service (DNS) response to a DNS query. The zone resiliency application then transmits the DNS response and the associated status record to a requester.

公开(公告)号：US20230362050A1

公开(公告)日：2023-11-09

申请号：US18221634

申请日：2023-07-13

申请人： VeriSign, Inc.

发明人： Burton S. KALISKI, JR. ,  Eric OSTERWEIL ,  Duane WESSELS ,  Frank SCALZO ,  Glen WILEY ,  Shumon HUQUE

IPC分类号： H04L41/0654 ,  H04W24/04 ,  H04L69/40 ,  H04L61/58 ,  H04L61/4511 ,  H04L61/5076

CPC分类号： H04L41/0654 ,  H04W24/04 ,  H04L69/40 ,  H04L61/58 ,  H04L61/4511 ,  H04L61/5076 ,  H04L41/042

摘要： In one embodiment, a zone resiliency application indicates that an authoritative name server is in a degraded state. In operation, the zone resiliency application determines that the authoritative name server is in a degraded state. The zone resiliency application then generates a status record that indicates the degraded state. Subsequently, the zone resiliency application associates the status record with a domain name service (DNS) response to a DNS query. The zone resiliency application then transmits the DNS response and the associated status record to a requester.

公开(公告)号：US20180375716A1

公开(公告)日：2018-12-27

申请号：US15881596

申请日：2018-01-26

申请人： Verisign, Inc.

发明人： Shumon HUQUE ,  Burton S. KALISKI, JR. ,  Eric OSTERWEIL ,  Frank SCALZO ,  Duane WESSELS ,  Glen WILEY

IPC分类号： H04L12/24

摘要： 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.