Method and device for implementing rDNS

Abstract

The invention relates to the field of communications and discloses a method and a device for implementing rDNS (reverse Domain Name System). The method comprises that an up-to-date and more complete target domain name list is obtained in time by utilizing the information acquirement capability of the web crawler technology, so that a more comprehensive forward mapping relation between IP addresses and domain names can be obtained, further the mapping relation between a domain name obtained through reverse arrangement processing and an IP address can be enabled to be more accurate and more complete. In this way, PIR (Production Inspection Record) type record is not required to be established or maintained through an ISP (Internet Service Provider), so that the computation complexity of rDNS can be reduced effectively, and service load of a server can be reduced; and meanwhile, the advantages of the web crawler technology in the aspect of information gathering are fully utilized to enable the obtained essential data to be more comprehensive and timely, so that a reverse mapping relation between an IP address and a domain name can be established completely, quickly and accurately, the result of rDNS can be more complete, and all domain names corresponding to a given IP address can be obtained.

Description

technical field [0001] The invention relates to the communication field, in particular to a method and device for realizing reverse domain name resolution. Background technique [0002] Reverse domain name resolution (ie Reverse DNS, referred to as rDNS or revDNS) is the opposite of traditional (forward) domain name resolution (ie DNS), which refers to the mapping from IP addresses to domain names. In short, it is possible to obtain the domain name associated with a certain IP address through domain name resolution. [0003] Reverse domain name resolution has a wide range of applications. In Web site access statistics or Internet traffic analysis, reverse domain name resolution can obtain visitor ISP (Internet Service Provider, Internet Service Provider) information. On the other hand, reverse domain name resolution can also be used for network diagnosis, for example, through reverse domain name resolution, the user's host name can be obtained. In addition, reverse domain...

AI Technical Summary

Problems solved by technology

[0007] First of all, it is difficult for ISPs to collect complete and comprehensive PTR type records. Obviously, incomplete PTR type records will directly lead to inaccurate reverse domain name resolution results;

[0008] Secondly, the implementation of reverse domain name resolution based on PTR type records will increase the computational complexity, because the ISP server needs to perform complex operations such as recursive queries, which will significantly increase the operating load of the ISP server

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