Multi-protocol active detection type intelligent DNS and method thereof

Abstract

The invention discloses a multi-protocol active detection type intelligent DNS (Domain Name System) and a method thereof, which support DNS upstream servers of UDP (User Datagram Protocol), TCP (Transmission Control Protocol), TLS (Transport Layer Server) and HTTPS (Hyper Text Transfer Protocol Security) protocols and provide DNS resolution services of the UDP, TCP, TLS and HTTPS protocols for a client; the unique node IP with the shortest response time can be selected as the domain name query result to be transmitted to the client by actively detecting the domain name resolution result IP ofthe upstream server, the intelligent DNS supports internal service packets, and each packet can directly respond to the request of the client through different protocols and ports. Compared with the prior art, the method has the advantages that while multiple DNS protocols are supported, the result IP can be actively judged and returned to the IP node with the shortest response time of the client,so that the response time of WEB is prolonged; by using the internal DNS service groups of different ports, the simplified deployment of the traditional DNS is realized; and the quality of the resolution address is improved while the use cost and the later maintenance amount are reduced, so that the method has popularization and application values.

Description

technical field [0001] The invention relates to the technical field of communication, in particular to a multi-protocol active detection intelligent DNS and a method thereof. Background technique [0002] With the development of the Internet to the present stage, the use of CDN (content caching service) has been very extensive. After the website domain name uses the CDN service, each domain name will correspond to many CDN nodes, and it is impossible for the CDN service provider to notify all DNS service providers in time after each update of the CDN service node, which leads to Internet terminal devices using different DNS services The IP addresses of the CDN nodes obtained by querying the domain name from the DNS server of the provider are not necessarily the same. The response time of these CDN node IP addresses to Internet terminals is either fast or slow. The problem of different speeds. [0003] At present, a large number of Internet terminals only support the domain...

AI Technical Summary

Problems solved by technology

After the website domain name uses the CDN service, each domain name will correspond to many CDN nodes, and it is impossible for the CDN service provider to notify all DNS service providers in time after each update of the CDN service node, which leads to Internet terminal devices using different DNS services The IP addresses of the CDN nodes obtained by querying the domain name from the DNS server of the provider are not necessarily the same. The response time of these CDN node IP addresses to Internet terminals is either fast or slow. problem with different speeds

[0003] At present, a large number of Internet terminals only support the domain name resolution service provided by the DNS server on port 53 of the UDP protocol, and DNS servers that support new protocols such as TCP, TLS, and HTTPS have also appeared in large numbers. Traditional Internet terminal devices cannot directly use these new DNSs. one question

[0004] In a large multi-network segment network with multi-operator egresses, the traffic policies of egress routers and firewalls usually require different internal network segments to preferentially use different operator networks, which requires that the internal DNS server can choose to switch the DNS group of the upstream operator , so as to use the carrier network more efficiently with the firewall and the routing strategy of the egress device. The traditional method is to deploy multiple DNS servers that adapt to the traffic policy and the carrier network. This method increases the cost of use and also increases the cost of later maintenance

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