US 11,122,138 B2 · Enhanced domain name system response caching

Abstract

Methods and systems for enhanced domain name system (DNS) response caching are described. An enhanced DNS response caching method includes receiving a connection request for a fully qualified domain name (FQDN). A DNS client checks a local cache for a cached resolved domain name corresponding to the FQDN and sends 3300 a query to obtain or refresh the cached resolved domain name if a Time to Live parameter is expired or about to expire. In response to receiving a negative response or no response for the query, the DNS client determines whether an enhanced DNS response caching parameter is enabled. If the enhanced DNS response caching parameter is enabled, the DNS client sends an expired cached resolved domain name to process the connection request.

Claims20

Dependent claims

A method for enhanced domain name system (DNS) response caching, the method comprising:

querying a cache for a cached resolved domain name associated with a connection request;
using a request type to set enhanced DNS response caching parameter enablement in response to non-refreshment of a matching cached resolved domain name;
and
processing the connection request by sending an expired matching cached resolved domain name for an enabled enhanced DNS response caching parameter.

1 more element

Dependencies are inferred from the claim text.

Facts

Application

17/012,520Filed 4 Sep 2020 · continuation

Priority

8 Mar 2019

Published

US 2020/0287985 A124 Dec 2020

Granted

14 Sep 2021

Term ends

Not estimatedThe source records don’t support an estimate.

Classification6 codes

H04L 61/58
Network arrangements, protocols or services for addressing or naming: caching of addresses or names
G06F 16/24552
Query execution: database cache management
H04L 61/4511
Using standardised directories; using standardised directory access protocols: using domain name system [DNS]
H04L 67/568
Provisioning of proxy services: storing data temporarily at an intermediate stage, e.g. caching

Family

Application16/296,396Parent of this continuation · filed 8 Mar 2019

US 2020/0404066 A1Pre-grant publication · published 24 Dec 2020

US 10,805,417 B2Parent of this continuation

US 2020/0287985 A1Published application

US 11,122,138 B2This patent

From the US filing history. Foreign family members aren’t listed.

Enhanced domain name system response caching

Life of this patent

Enhanced domain name system response caching

Life of this patent

Abstract

Claims20