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Query method of analysis system, number domain name system server and system

A technology of domain name system and query method, which is applied in the field of analysis system query, IP, server and system, can solve problems such as query cycle, query time increase, system crash, denial of service, etc., to overcome insecurity and overload, Improve performance and security, save query time

Active Publication Date: 2013-07-17
CHINA MOBILE COMM GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] 1. When a malicious user continues to dial different phone numbers, the entries stored in the domain name system server cache of the second-level number will be swapped in and out, resulting in a large number of queries to the domain name system server of the first-level number, and this will also cause As a result, the entries in the domain name system server cache of the first-level number are constantly swapped in and out to query the domain name system server of the target second-level number, which makes the entire query cycle and query time longer
[0008] 2. When multiple second-level servers have a large amount of queries, the load on the first-level server is too large, and the performance is reduced. In severe cases, the first-level server will fail, so that the query results cannot be returned to the second-level server, resulting in the paralysis of the entire system. And there are security risks of malicious attacks
[0009] 3. The first-level number domain name system server query method as mentioned in question 1 will cost a lot of query overhead, and even make the entire IMS network unable to connect and provide normal services, which is very likely to cause serious consequences, such as denial of service (Denial of Service, referred to as DoS) attack

Method used

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  • Query method of analysis system, number domain name system server and system
  • Query method of analysis system, number domain name system server and system
  • Query method of analysis system, number domain name system server and system

Examples

Experimental program
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Embodiment 1

[0035] Such as figure 2 As shown, the first-level number domain name system server in this embodiment includes a deployment level and a deployed level two-tier structure, wherein the deployment level can include a primary deployment level server (such as figure 2 primary provisioning) and backup provisioning-level servers (such as figure 2 standby deployment), the deployed level includes n servers. In this embodiment, multiple devices or servers are logically linked into a first-level ENUMDNS server. The deployment level is mainly used to receive the request message sent by the second-level ENUMDNS server, and select one of the deployment levels according to the preset strategy for message processing and subsequent query. . The dispatched class is mainly used for processing messages.

[0036] Among them, the deployment level can store the index and routing of each deployed level, and distribute the query message to the selected deployed level. The specific strategy for sel...

Embodiment 2

[0042] Combine below figure 2 The query method of the analysis system of the present invention is illustrated, and the query method of this embodiment includes:

[0043] A. The first-level ENUMDNS server is divided into deployment level and deployed level in advance, and the deployed level is composed of n (n>2) servers;

[0044] B. The deployment level of the first-level ENUMDNS server (such as figure 2 When receiving the query message from the second-level ENUM DNS server, the main deployment shown in the figure distributes the query message to one of the deployed servers according to the preset strategy.

[0045] C. The server at the assigned level directly returns the query processing result to the secondary ENUMDNS server that sent the query request.

[0046] This embodiment also shows a security mechanism that divides the deployment level into primary and backup. Normally, the standby deployment level is used to back up the deployment data of the primary deployment l...

Embodiment 3

[0049] image 3 It is a flowchart of an embodiment of the operation process of the deployment level in the analysis system query method according to the present invention, such as image 3 As shown, this embodiment includes:

[0050] Step S302: the deployed server processes the query message and sends it to the target secondary ENUMDNS server of the query;

[0051] Step S304: The target secondary ENUMDNS server returns the query result to the deployed server;

[0052] Step S306: the deployed server returns the query result to the secondary ENUM DNS server.

[0053] Figure 4 It is the second embodiment of the inquiry method of the analysis system according to the present invention and the analysis diagram of the inquiry system of the present invention. Figure 4 That is, it can be used as an embodiment structure of the query system of the present invention, and can also be used as a schematic flowchart of another embodiment of the query method of the analysis system of the...

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Abstract

The invention discloses a query method of an analysis system, a number domain name system server and a system. The method comprises the following steps that: a first-grade number domain name system server is divided into an allocating level and an allocated level, wherein the allocated level consists of more than two servers; when receiving the query information of a second-grade number domain name system server, the allocating level distributes the query information to one of the servers of the allocated level; and the server of the allocated level returns the query processing result to the second-grade number domain name system server. Through the query method of the analysis system, the number domain name system server and the system of the invention, safe query can be realized under severe environment of an IMS network system and the performance of the first-grade number domain name system server can be improved.

Description

technical field [0001] The present invention relates to the IP technology in the core network in the field of communication, in particular, to an E.164 Number Domain Name System (E.164 Number Domain Name System, referred to as IMS) network in an IP Multimedia Subsystem (IP Multimedia Core Network Subsystem, referred to as IMS) network ENUMDNS) analysis system query method, server and system. Background technique [0002] ENUMDNS in IMS is a distributed database that stores the correspondence between the Tel Uri format and Sip Uri format of each telephone number registered on the IMS network, the name of each system consisting of letters and numbers, and its IP address or Other more information, where each entry is called a resource record (RR). An entry in the ENUM DNS server maps a domain name to an IP address, called an address record. [0003] The ENUM DNS in the prior art mainly has two query mechanisms: recursive query and iterative query. When the DNS client queries...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L29/12H04L29/08H04L29/06
Inventor 李洋方桂彬
Owner CHINA MOBILE COMM GRP CO LTD
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