CN102891901A - Dynamic domain name resolution method, server and domain name service system - Google Patents
Dynamic domain name resolution method, server and domain name service system Download PDFInfo
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Abstract
The invention discloses a dynamic domain name resolution method, a server and a domain name service system. The method comprises the following steps that: a dynamic domain name resolution server receives domain name resolution request information sent by a service requesting user, wherein the domain name resolution request information contains the domain name of a service providing user; and the dynamic domain name server searches a public network IP (Internet Protocol) address and a port number corresponding to the domain name from a domain name information database, and feeds back the searched public IP address and port number to the service requesting user, thus, the service requesting user can visit the service providing user according to the public IP address and the port number, wherein the domain name information database stores the domain name of the service providing user, and the public IP address and the port number of the service providing user corresponding to the domain name. The technical scheme provided by the invention can effectively provide the dynamic domain name resolution service for a private network IP address user in an access network in which NAPT (Network Address Port Translation) devices are arranged.
Description
Technical field
The present invention relates to the communication technology, relate in particular to a kind of dynamic territory analyzing method, server and DNS.
Background technology
Fast development along with the Internet; the IP address resource becomes scarce resource gradually; for guaranteeing IP address utilance; operator can provide dynamic IP address to the user usually; and the user normally conducts interviews by domain name when accessing the Internet; therefore; DDNS service (Dynamic Domain Name Server has also just appearred; DDNS); so-called DDNS refers to that user such as need externally provide service; can pass through subscriber terminal equipment as the dynamic territory analyzing client; behind user Internet access, the dynamic IP addressing that self will be obtained be announced to the dynamic domain name server device, when other users need to access the service that this user provides; just can inquire about the dynamic IP addressing that corresponding domain name obtains this user by access dynamic domain name server device, thus can be according to the IP address that obtains to user access.
In view of the finiteness of IP address resource, operator can solve the problem of IP address resource shortage by on-premise network address port conversion (Network Address Port Translation, NAPT) equipment usually.After disposing NAPT, when the Access Network of user by operator is connected to the Internet, Access Network can be user's dynamic assignment one public network IP address, also can be user assignment one private network IP address and corresponding port numbers simultaneously, and, the internal network of operator, namely different private network IP address can be mapped on the same public network IP address in the private network, and private network IP address different in the private network can be distinguished by port numbers.Because traditional DDNS only can provide effective dynamic domain name server for public network IP address, and for the Access Network of disposing NAPT, distribute the user who obtains private network IP address the private network IP address of its acquisition can be announced to the dynamic domain name server device, when other users need to access the service that this user provides, obtain user's private network IP address by access dynamic territory analyzing inquiry corresponding field star, but, this private network IP address can not overall route, so other users can't realize access to the user according to the private network IP address that obtains by dynamic territory analyzing.
In summary it can be seen, for the Access Network of disposing NAPT, distribute the user who obtains private network IP address will announce to the dynamic domain name server device private network IP address of its acquisition, and this private network IP address can not overall route, other users can't have access to this user by the private network IP address that dynamic territory analyzing obtains, and this user also just can't provide service for other user.
Summary of the invention
The invention provides a kind of dynamic territory analyzing method, server and DNS, can provide dynamic domain name server to distributing the user who obtains private network IP address in the Access Network of disposing NAPT.
The invention provides a kind of dynamic territory analyzing method, comprising:
The dynamic domain name server device receives the domain name mapping solicited message that the service request user sends, and the domain name resolution request message comprises that service provides user's domain name;
Described dynamic domain name server device is searched the public network IP address corresponding with domain name and port numbers from the domain-name information database, and feed back to described service request user, so that described service request user provides the user according to described public network IP address and port numbers access services, wherein, the domain name information database stores the domain name that service provides the user, and the service corresponding with domain name provides user's public network IP address and port numbers.
The invention provides a kind of dynamic domain name server device, comprising:
Domain name mapping solicited message receiver module is used for receiving the domain name mapping solicited message that the service request user sends, and the domain name resolution request message comprises that service provides user's domain name;
IP address feedback module, be used for searching the public network IP address corresponding with domain name and port numbers from the domain-name information database, and feed back to described service request user, so that described service request user provides the user according to described public network IP address and port numbers access services, wherein, the domain name information database stores the domain name that service provides the user, and the service corresponding with domain name provides user's public network IP address and port numbers.
The invention provides a kind of DNS, comprising: dynamic domain name server device, network address port conversion equipment and access server, wherein:
Described dynamic domain name server device, be used for receiving the domain name mapping solicited message that the service request user sends, the domain name resolution request message comprises that service provides user's domain name, and from the domain-name information database, search the public network IP address corresponding with domain name and port numbers, and feed back to described service request user, wherein, the domain name information database stores the domain name that service provides the user, and the service corresponding with domain name provides user's public network IP address and port numbers;
Described access server, be used for receiving the requests of packets of data that described service request user provides the user to send according to described public network IP address and port numbers to service, extract described public network IP address and port numbers in the described requests of packets of data, and inquire about the private network IP address that described service provides the user to the network address port conversion equipment, described requests of packets of data is transmitted to described service the user is provided.
Dynamic territory analyzing method provided by the invention, server and DNS, user's public network IP address and port numbers can be provided to service corresponding to the domain name that the service request user provides it to ask, so that the service request user can be by public network IP address and the port numbers that provides, realization provides user's access to service, because port numbers provides user's private network IP address corresponding with service, distribute the user of private network IP address that dynamic domain name server is provided in the Access Network of disposing NAPT thereby can be.
Description of drawings
The schematic flow sheet of the dynamic territory analyzing method that Fig. 1 provides for the embodiment of the invention one;
The structural representation of the dynamic domain name server device that Fig. 2 provides for the embodiment of the invention two;
The structural representation of the dynamic domain name server device that Fig. 3 provides for the embodiment of the invention three;
The structural representation of the DNS that Fig. 4 provides for the embodiment of the invention four;
The schematic flow sheet of the dynamic territory analyzing method that Fig. 5 provides for the embodiment of the invention five.
Embodiment
The schematic flow sheet of the dynamic territory analyzing method that Fig. 1 provides for the embodiment of the invention one.As shown in Figure 1, the method can may further comprise the steps:
Present embodiment is applied in the dynamic domain name server, can provide dynamic domain name server to the private user in the Access Network of disposing NAPT equipment.Particularly, service provides the user, be that private user passes through the Access Network accessing Internet, when being public network, access server can provide the NAPT devices allocation user's public network IP address to service, port numbers and service provide user's domain name to send to the dynamic domain name server device, and service is provided user's domain name by the dynamic domain name server device, public network IP address and port numbers by relational storage one to one in the domain-name information database, like this, the dynamic domain name server device is when the domain name mapping request that receives the service request user, just can in the domain-name information database, inquire about and obtain corresponding public network IP address and the port numbers of domain name that its service of asking provides the user, like this, service request user just can provide user access to service by public network IP address and the port numbers that obtains, the service of using service to provide the user to provide, thereby so that provide the user to provide service for other user in the Internet as the service of private user, so that the service that other user only need to provide the user to provide with regard to accessible services by inputting domain name.
The dynamic territory analyzing method that present embodiment provides, user's public network IP address and port numbers can be provided to service corresponding to the domain name that the service request user provides it to ask, so that the service request user can be by public network IP address and the port numbers that provides, realization provides user's access to service, because port numbers provides user's private network IP address corresponding with service, distribute the user who obtains private network IP address that dynamic domain name server is provided in the Access Network of disposing NAPT thereby can be.
The structural representation of the dynamic domain name server device that Fig. 2 provides for the embodiment of the invention two.As shown in Figure 2, this server can comprise domain name mapping solicited message receiver module 1 and IP address feedback module 2, wherein:
Domain name mapping solicited message receiver module 1 is used for receiving the domain name mapping solicited message that the service request user sends, and this domain name mapping solicited message comprises that service provides user's domain name;
IP address feedback module 2, be used for searching public network IP address and the port numbers corresponding with serving domain name that the user is provided from the domain-name information database, and feed back to the service request user, so that service request user provides the user according to this public network IP address and port numbers access services, wherein, the domain-name information database stores the domain name that service provides the user, and the service corresponding with domain name provides user's public network IP address and port numbers.
Present embodiment can be applicable to dispose in the Access Network of NAPT equipment, and for the user who is assigned private network IP address in the Access Network provides dynamic domain name server, its specific implementation process can referring to the explanation of the invention described above embodiment of the method, not repeat them here.
The structural representation of the dynamic domain name server device that Fig. 3 provides for the embodiment of the invention three.On the basis of above-mentioned technical scheme embodiment illustrated in fig. 2, as shown in Figure 3, this server also can comprise domain name announcement receiver module 3 and domain name memory module 4, wherein:
Domain name announcement receiver module 3 is used for the domain name advertised information that the reception service provides user's access server to send, and this domain name advertised information comprises that service provides user's domain name, and public network IP address and port numbers that user assignment is provided for service;
Domain name memory module 4 be used for the domain name with this domain name advertised information, and the service corresponding with domain name provides user's public network IP address and port numbers to be stored in the domain-name information database.
In the present embodiment, receive by domain name announcement receiver module 3 and domain name memory module 4 capable of dynamics and to distribute to public network IP address and the port numbers that this service provides the user when service that obtains private network IP address provides user Internet access, and service can be provided user's domain name, and serve and distribute the public network IP address and the port numbers that obtain to be stored in the domain-name information database when user Internet access is provided, like this, when service request user's access services provides the user, user's public network IP address and port numbers just can be provided from the service of obtaining of dynamic domain name resolution server, and access services provides the user.
It will be appreciated by those skilled in the art that, when service provides the each accessing Internet of user, access server in the Access Network all can provide service user's domain name, and for providing the public network IP address of user assignment and port numbers, service sends to the dynamic domain name server device, preserved by the dynamic domain name server device, thereby can be the service request user dynamic domain name server is provided, it is accurately, reliably that the service that assurance service request user obtains provides user's public network IP address and port numbers.
The structural representation of the DNS that Fig. 4 provides for the embodiment of the invention four.As shown in Figure 4, the present embodiment system can comprise dynamic domain name server device 10, NAPT equipment 20 and access server 30, wherein:
Dynamic domain name server device 10, be used for receiving the domain name mapping solicited message that the service request user sends, this domain name mapping solicited message comprises that service provides user's domain name, and be used for searching public network IP address and the port numbers corresponding with serving domain name that the user is provided from the domain-name information database, and feed back to the service request user, wherein, the domain-name information database stores the domain name that service provides the user, and the service corresponding with domain name provides user's public network IP address and port numbers;
In the present embodiment, NAPT equipment 20 can be when service provides the user to pass through access server 30 accessing Internet, and for service provides user assignment public ip address, private network IP address and port numbers, wherein, port numbers is unique corresponding with private network IP address.NAPT equipment is for after service provides the user assignment private network IP address, and access server 30 just can provide telex network by this private network IP address and service.
In the present embodiment, access server 30 can be used as service in the private network other user on user and the Internet is provided, for example the route exchange device of data communication between the service request user provides between user and the service request user and can communicate by this access server 30 so that serve.Therefore, as long as the service request user obtains public network IP address and the port numbers that service provides the user from dynamic domain name resolution server 10, can provide the user to establish a communications link by access server 30 and service, the service that access services provides the user to provide.
In the present embodiment, above-mentioned access server 30 specifically can be BAS Broadband Access Server (Broadband Remote Access Server, BRAS), and this BRAS can provide the data communication between private user and the public network user.
It will be appreciated by persons skilled in the art that above-mentioned service provides the user to refer to service available communication equipment, it can be linked in the Internet by access server; Above-mentioned service request user refers to other communication equipment on the Internet, can access the dynamic domain name server device, obtaining to serve by dynamic territory analyzing provides public network IP address corresponding to user and port numbers, and then realizes service is provided user's access.
For ease of technical solution of the present invention is had a better understanding, the below will describe with the specific implementation in the invention described above system embodiment.
The schematic flow sheet of the dynamic territory analyzing method that Fig. 5 provides for the embodiment of the invention five.For ease of understanding, replace above-mentioned service that the user is provided DDNS user among Fig. 5, the terminal use replaces above-mentioned service request user, access server adopts BRAS, and DDNS user can provide service to the terminal use, particularly, as shown in Figure 5, the method can comprise the steps:
Step 201, DDNS user pass through the Access Network of PPPoE or IPoE mode access carrier, initiate access request to BRAS, and this access request comprises the access informations such as user name and password;
Step 202, BRAS carry out user name and cipher authentication to DDNS, and after authentication is passed through, initiate query requests to NAPT equipment;
Step 203, NAPT equipment can according to the query requests of BRAS, be DDNS user assignment public network IP address, private network IP address and port numbers, and feed back to BRAS;
Step 204, BRAS send the domain name advertised information to the dynamic domain name server device, announcement DDNS user's domain name, and the public network IP address corresponding with domain name and port numbers, after the dynamic domain name server device received this advertised information, domain name that can will comprise in this advertised information and the DDNS user's corresponding with domain name public network IP address and port numbers were stored in the domain-name information database;
When step 205, terminal use wish to access the service that DDNS user provides, can initiate the domain name mapping request to the dynamic domain name server device, namely send the domain name mapping solicited message, obtain DDNS user's corresponding public network IP address and the port numbers of domain name with request, the domain name that wherein, should comprise DDNS user in this domain name mapping solicited message;
Step 206, dynamic domain name server device can be inquired about from the domain-name information database and obtain the public network IP address corresponding with DDNS user's domain name and port numbers, and DDNS user's public network IP address and port numbers fed back to the terminal use;
Step 207, terminal use can initiate requests of packets of data to DDNS user according to the DDNS user's who obtains public network IP address and port numbers, include public network IP address and port numbers in this requests of packets of data;
When step 208, BRAS receive the requests of packets of data that the terminal use sends to DDNS user, extract public network IP address and port numbers in the request data package, and can according to this public network IP address and port numbers, obtain DDNS user's private network IP address to the NAPT equipment query;
Step 209, NAPT equipment can feed back to BRAS with DDNS user's private network IP address;
Step 210, BRAS can be according to DDNS user's private network IP address, and the requests of packets of data that the terminal use is sent is transmitted to DDNS user;
Step 211, DDNS user can be according to terminal use's service requests, set up and the communicating by letter of terminal use, for the terminal use provides service.
In the present embodiment, DDNS user is by the Access Network accessing Internet time, BRAS can be public network IP address, private network IP address and the port numbers of DDNS user assignment according to NAPT equipment, DDNS user's domain name is provided to the dynamic domain name server device, and corresponding public network IP address and port numbers, the dynamic domain name server device can provide private user to the terminal use like this, i.e. DDNS user's domain name mapping service.
In the present embodiment, the terminal use is when access DDNS user, only need to know that DDNS user's domain name gets final product, the dynamic domain name server device can feed back to the terminal use with the public network IP address corresponding with DDNS user's domain name and port numbers, so that the terminal use can access DDNS user.
In the present embodiment, BRAS also can self store by it and be connected to mapping relations table between the DDNS user's of the Internet public network IP address, private network IP address and the port numbers, like this, when BRAS receives the packet that sends to DDNS user, can utilize the mapping relations table of self storing to search the private network IP address that obtains DDNS user, the packet that thereby the terminal use can be sent is transmitted to DDNS user by private network IP address.
One of ordinary skill in the art will appreciate that: all or part of step that realizes said method embodiment can be finished by the relevant hardware of program command, aforesaid program can be stored in the computer read/write memory medium, this program is carried out the step that comprises said method embodiment when carrying out; And aforesaid storage medium comprises: the various media that can be program code stored such as ROM, RAM, magnetic disc or CD.
It should be noted that at last: above embodiment only in order to technical scheme of the present invention to be described, is not intended to limit; Although with reference to previous embodiment the present invention is had been described in detail, those of ordinary skill in the art is to be understood that: it still can be made amendment to the technical scheme that aforementioned each embodiment puts down in writing, and perhaps part technical characterictic wherein is equal to replacement; And these modifications or replacement do not make the essence of appropriate technical solution break away from the spirit and scope of various embodiments of the present invention technical scheme.
Claims (5)
1. a dynamic territory analyzing method is characterized in that, comprising:
The dynamic domain name server device receives the domain name mapping solicited message that the service request user sends, and the domain name resolution request message comprises that service provides user's domain name;
Described dynamic domain name server device is searched the public network IP address corresponding with domain name and port numbers from the domain-name information database, and feed back to described service request user, so that described service request user provides the user according to described public network IP address and port numbers access services, wherein, the domain name information database stores the domain name that service provides the user, and the service corresponding with domain name provides user's public network IP address and port numbers.
2. dynamic territory analyzing method according to claim 1 is characterized in that, also comprises:
The domain name advertised information that described dynamic domain name server device reception service provides user's access server to send, the domain name advertised information comprises that service provides user's domain name, and public network IP address and port numbers that user assignment is provided for described service;
Described dynamic domain name server device is with the domain name in the domain name advertised information, and the service corresponding with domain name provides user's public network IP address and port numbers to be stored in the domain-name information database.
3. a dynamic domain name server device is characterized in that, comprising:
Domain name mapping solicited message receiver module is used for receiving the domain name mapping solicited message that the service request user sends, and the domain name resolution request message comprises that service provides user's domain name;
IP address feedback module, be used for searching the public network IP address corresponding with domain name and port numbers from the domain-name information database, and feed back to described service request user, so that described service request user provides the user according to described public network IP address and port numbers access services, wherein, the domain name information database stores the domain name that service provides the user, and the service corresponding with domain name provides user's public network IP address and port numbers.
4. dynamic domain name server device according to claim 3 is characterized in that, also comprises:
Domain name announcement receiver module is used for the domain name advertised information that the reception service provides user's access server to send, and the domain name advertised information comprises that service provides user's domain name, and public network IP address and port numbers that user assignment is provided for described service;
The domain name memory module be used for the domain name with the domain name advertised information, and the service corresponding with domain name provides user's public network IP address and port numbers to be stored in the domain-name information database.
5. a DNS is characterized in that, comprising: dynamic domain name server device, network address port conversion equipment and access server, wherein:
Described dynamic domain name server device, be used for receiving the domain name mapping solicited message that the service request user sends, the domain name resolution request message comprises that service provides user's domain name, and from the domain-name information database, search the public network IP address corresponding with domain name and port numbers, and feed back to described service request user, wherein, the domain name information database stores the domain name that service provides the user, and the service corresponding with domain name provides user's public network IP address and port numbers;
Described access server, be used for receiving the requests of packets of data that described service request user provides the user to send according to described public network IP address and port numbers to service, extract described public network IP address and port numbers in the described requests of packets of data, and inquire about the private network IP address that described service provides the user to the network address port conversion equipment, described requests of packets of data is transmitted to described service the user is provided.
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| CN2012103616800A CN102891901A (en) | 2012-09-25 | 2012-09-25 | Dynamic domain name resolution method, server and domain name service system |
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| CN105657077A (en) * | 2014-11-13 | 2016-06-08 | 中国移动通信集团公司 | Network address translation traversal method and network address translation equipment |
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| CN117082152A (en) * | 2023-09-27 | 2023-11-17 | 新华三技术有限公司 | Service processing method, system and device |
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Application publication date: 20130123 |