Domain name recursive query method and system, server and DNS system

Abstract

The invention provides a domain name recursion query method and system, a DNS recursion server, a DNS system and a storage medium, and relates to the technical field of communication, and the method comprises the steps: building a first mapping table comprising a mapping relation between a first region and a first local IP address; receiving a first domain name query request, obtaining a first user IP address in the first domain name query request, and determining a first user attribution area corresponding to the first user IP address according to the IP geographic position database; obtaining a first local IP address corresponding to the first user attribution area according to the first mapping table; and adding the first local IP address into the first domain name query request and sending the first domain name query request. According to the method, the system, the server, the DNS system and the storage medium disclosed by the invention, the DNS scheduling accuracy can be effectively improved, the recursive query request frequency is greatly reduced, the resource consumption of the recursive server and the authoritative server is effectively reduced, and the user experience isimproved.

Description

Technical field [0001] The present disclosure relates to the field of communication technology, and in particular to a method and system for recursive query of domain names, a DNS recursive server, a DNS system, and a storage medium. Background technique [0002] Domain name recursive query means that after the client sends a domain name resolution request to the designated DNS server, the server traverses the domain name space by searching for the domain name authorization server from the root zone, and finally obtains the response record corresponding to the domain name by interacting with the authorization server, and then returns it to Client. Edns-client-subnet (ECS) is a DNS extension protocol proposed by Google, which can be applied to DNS intelligent scheduling, CDN and other fields. Its main function is to pass the user's source IP to the authority by extending the option field during domain name recursive query. DNS provides users with more accurate resolution results....

AI Technical Summary

Problems solved by technology

[0003] At present, in the process of using the ECS mechanism for domain name recursive query, by default, a network segment address with a mask length of 24 bits is inserted into the domain name recursive query request packet. Enabling the ECS mechanism on the recursive and authoritative DNS server will result in the recursive query request volume and DNS cache capacity increases dramatically

The current response strategy is usually to shorten the mask length to reduce resource consumption and the number of requests, but for the widespread discretization of IP addresses caused by the shortage of IPv4 addresses, it will lead to inaccurate analysis results and poor user experience.

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