Method and system of preventing DNS strong solution result from being polluted

Abstract

The invention discloses a method and a system of preventing a DNS strong solution result from being polluted, and belongs to the DNS resolution and management technology field. The method comprises steps that a DNS recursion or cache server is used to mark a query type used for introducing a cache in a CNAME type resource record, and when the CNAME cache occurs during subsequent processing of a query request; whether the query type in the CNAME cache mark comprises the current query type is checked at first; when the query type in the CNAME cache mark comprises the current query type, the cache is used for the next step of query; and when the query type in the CNAME cache mark does not comprise the current query type, the CNAME cache is ignored, and the query request is transmitted outwards according to a configured query rule. The technical scheme provided by the invention is used to solve a problem that because of network mirror image and other requirements, the strong solution result is interfered by the CNAME type cache record having the same domain name in the cache during the strong solution of the specific type query result of the domain names by broadcast and TV, operators, or other access providers.

Description

technical field [0001] The invention relates to the technical field of computer DNS analysis and management, in particular to a method and system for preventing DNS strong solution results from being polluted. Background technique [0002] At present, in the field of computer domain name server (Domain Name System, referred to as DNS), some radio and television companies, operators or other access providers need to perform mandatory analysis of specified types of queries of certain domain names for website caching and other needs, and change the query returned to external queries. Really parse the results, other types of queries return normal query results. Due to the technical requirements of Content Delivery Network (CDN) and other technologies, a large number of domain names are configured with multi-level CNAME redirection, so the domain name configured for forced resolution is usually a domain name of a certain level on the CNAME chain. [0003] The strong solution mec...

AI Technical Summary

Problems solved by technology

[0003] The strong solution mechanism has the following defects: Because usually only the specified type of query results of the domain name are strong resolved, when the DNS server processes the non-strong solution type query of the strong solution domain name or a domain name upstream of the CNAME chain of the strong solution domain name, it may introduce a strong solution domain name. CNAME type cache

If the CNAME type record of the strong solution domain name enters the cache earlier than the strong solution type query is triggered, or the CNAME type cache time is longer than the strong solution type cache, the DNS server will use the CNAME cache when processing the strong solution type query, and will not send out the strong solution Strong solution type query of the domain name, causing the force solution mechanism to fail

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