CN105262851A - DNS forwarding method and system based on multiple strategies - Google Patents
DNS forwarding method and system based on multiple strategies Download PDFInfo
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- CN105262851A CN105262851A CN201510591135.4A CN201510591135A CN105262851A CN 105262851 A CN105262851 A CN 105262851A CN 201510591135 A CN201510591135 A CN 201510591135A CN 105262851 A CN105262851 A CN 105262851A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L61/00—Network arrangements, protocols or services for addressing or naming
- H04L61/09—Mapping addresses
- H04L61/10—Mapping addresses of different types
Abstract
The invention relates to the technical field of computer domain name analysis and discloses a DNS forwarding method based on multiple strategies. The method comprises the steps of: newly establishing a forwarding region on a local DNS server, and creating different forwarding modes in the forwarding region, wherein the forwarding modes include three kinds: first, only and no; creating different forwarding server selecting strategies under the three kinds of forwarding modes, wherein the forwarding server selecting strategies include three kinds: RTT, ORDER and WEIGHT; after a client sends out a request, returning results by the local DNS server according to the different strategies. By adopting the DNS forwarding method based on the multiple strategies, the local DNS server is enabled to carry out forwarding and querying according to an assigned method and strategy, so that the diversity and the flexibility of a domain name analysis process are realized, and wider domain name analysis usage requirements are met.
Description
Technical field
The present invention relates to computer technical field of domain name resolution, particularly relate to a kind of based on shifty DNS retransmission method and system.
Background technology
DNS (DomainNameSystem, domain name system), as the distributed data base that domain name and IP address map mutually on internet, user can be made to access the Internet more easily, and do not spend the IP string remembeing directly to be read by machine.By host name, the process finally obtaining IP address corresponding to this host name is called domain name mapping (or hostname resolution).
At present, a local dns can select first or only respectively for different districts, identical forwarding inquiries process is all made to the domain-name information request of each client, the parsing of domain name cannot be carried out according to the methods and strategies of specifying, process of analysis lacks flexibility and diversity, cannot meet domain name mapping instructions for use widely.
Summary of the invention
Technical problem to be solved by this invention is, provides a kind of based on shifty DNS retransmission method and system, and to solve, dns server cannot carry out the parsing of domain name according to the method for specifying and order, process of analysis lacks flexibility and multifarious problem.
The present invention solves the problems of the technologies described above adopted technical scheme and is to provide a kind of based on shifty DNS retransmission method, and the method comprising the steps of:
S1, on local dns server newly-built Forward Area, by client send domain name mapping be forwarded to the server of specifying;
S2, on described Forward Area, create first, only and no tri-kinds of pass-through modes;
S3, under described first, only and no tri-kinds of pass-through modes, create RTT, ORDER and WEIGHT tri-kinds of forwarding server Selection Strategies;
S4, to configure described Forward Area strategy according to described pass-through mode and forwarding server Selection Strategy, after receiving described client-requested, return forwarding analysis result according to difference described Forward Area strategy.
Preferably, in step S2, described first pass-through mode comprises step:
S201, described local dns server receive the domain name mapping request belonging to described Forward Area that described client sends;
S202, domain name analysis request to be sent on given server, and to judge whether described server can reach;
If S203 has, then return the domain-name information of described client-requested;
If S204 nothing, then carry out recursive query, and recurrence result is returned described client.
Preferably, in step S2, described only pass-through mode comprises step:
S211, described local dns server receive the domain name mapping request belonging to described Forward Area that described client sends;
S212, domain name analysis request to be sent on given server, and to judge whether described server can reach;
If S213 has, then the response result of described server is back to described client;
If S214 nothing, then return corresponding type of error, described local dns server stops recursive query.
Preferably, in step S2, when adopting described no pass-through mode, described local dns server carries out recursive query to the domain name mapping request that described client sends, and does not adopt first or the only mode in father district, and recurrence result is back to client.
Preferably, in step S3, when Forward Area destination server is more than 1, described RTT, ORDER and WEIGHT forwarding server Selection Strategy specifies the priority orders of transfer sequence and each application target server of forwarding server weight definition respectively according to round-trip delay, user, inquire about according to described priority orders, if described server returns requested domain-name information, then stop inquiry; If the server failure that described priority is high, then the server of a sequential query time priority.
On the other hand, the invention provides a kind of based on shifty DNS repeater system, described system comprises:
Creating unit, for Forward Area newly-built on local dns server;
Retransmission unit, is forwarded to given server for the domain name mapping request belonging to described Forward Area described client sent by described local dns server;
Query unit, for inquiring about in each server whether have requested domain-name information;
Strategy dispensing unit, for configuring described Forward Area strategy according to described pass-through mode and forwarding server Selection Strategy, after receiving described client-requested, returns forwarding analysis result according to difference described Forward Area strategy.
Preferably, described retransmission unit comprises judging unit, for judging whether described given server can reach.
Preferably, described retransmission unit also comprises first retransmission unit, only retransmission unit, according to described judging unit, if described given server can reach, then
When adopting described first retransmission unit to forward, return the domain-name information of described client-requested;
When adopting described only retransmission unit to forward, the response result of described server is back to described client;
If described given server is without the domain-name information of correspondence, then
When adopting described first retransmission unit to forward, carrying out recursive query, and recurrence result is returned described client;
When adopting described only retransmission unit process, return corresponding type of error, described local dns server stops recursive query.
Preferably, described retransmission unit also comprises no unit, carries out recursive query, and does not adopt first or the only mode in father district, recurrence result is back to client by described local dns server to the domain name mapping request that described client sends.
Preferably, described query unit comprises RTT query unit, ORDER query unit and WEIGHT query unit, the priority orders of transfer sequence and each application target server of forwarding server weight definition is specified respectively according to round-trip delay, user, inquire about according to described priority orders, if described server returns requested domain-name information, then stop inquiry; If the server failure that described priority is high, then the server of a sequential query time priority.
Accompanying drawing explanation
Fig. 1 is the flow chart based on shifty DNS retransmission method in a preferred embodiment of the present invention;
Fig. 2 is the structure chart based on shifty DNS repeater system in a preferred embodiment of the present invention.
Embodiment
Following examples only for technical scheme of the present invention is clearly described, and can not limit the scope of the invention with this.Specification subsequent descriptions is for implementing better embodiment of the present invention, and right described description is to illustrate for the purpose of rule of the present invention, and is not used to limit scope of the present invention.Protection scope of the present invention is when being as the criterion depending on the claims person of defining.
Below in conjunction with the drawings and specific embodiments, the present invention is described in further details.
As shown in Figure 1, be a preferred embodiment of the present invention, disclose a kind of shifty DNS retransmission method, the method comprises step:
S1, on local dns server newly-built Forward Area, by client send domain name mapping be forwarded to the server of specifying;
S2, on Forward Area, create first, only and no tri-kinds of pass-through modes;
S3, under first, only and no tri-kinds of pass-through modes, create RTT, ORDER and WEIGHT tri-kinds of forwarding server Selection Strategies;
S4, according to pass-through mode and forwarding server Selection Strategy configuration Forward Area strategy, after receiving client-requested, return forwarding analysis result according to different Forward Areas strategy.
In the present embodiment, first, only and no tri-kinds of pass-through modes and the forwarding of RTT, ORDER and WEIGHT tri-kinds of forwarding server Selection Strategies to the domain name mapping request that client sends is adopted to carry out strategy configuration, dns server can be carried out according to the method for specifying and order the parsing of domain name, thus achieve the variation of domain name mapping flow process, domain name mapping flow process is more flexible, can meet domain name mapping instructions for use more widely.
Further, in step S2, first pass-through mode comprises step:
S201, local dns server receive the domain name mapping request belonging to Forward Area that client sends;
S202, domain name mapping request to be sent on given server, and to judge whether server can reach;
If S203 has, then return the domain-name information of client-requested;
If S204 nothing, then carry out recursive query, and recurrence result is returned client.
Further, in step S2, only pass-through mode comprises step:
S211, local dns server receive the domain name mapping request belonging to Forward Area that client sends;
S212, domain name mapping request to be sent on given server, and to judge whether server can reach;
If S213 has, then the response result of server is back to client;
If S214 nothing, then return corresponding type of error, local dns server stops recursive query.
Further, in step S2, when adopting no pass-through mode, local dns server carries out recursive query to the domain name mapping request that client sends, and does not adopt first or the only mode in father district, and recurrence result is back to client.
In the present embodiment, pass through first, only and no tri-kinds of pass-through modes, complete the process to the domain name mapping request that different disposal requires, first pass-through mode forwards analysis request, and recursive query determination analysis result, only pass-through mode only forwards to given server, determine analysis result, if without result, then return error message, no pass-through mode only carries out recursive query and does not forward to server, and return Query Result, can forward to difference the request required like this and carry out different disposal, obtain analysis result fast, saving resource and time.
Further, in step S3, when Forward Area destination server is more than 1, RTT, ORDER and WEIGHT forwarding server Selection Strategy specifies the priority orders of transfer sequence and each application target server of forwarding server weight definition respectively according to round-trip delay, user, inquire about according to priority orders, if server returns requested domain-name information, then stop inquiry; If the server failure that priority is high, then the server of a sequential query time priority.
In the present embodiment, RTT forwarding server Selection Strategy is the shortest in limit priority with round-trip delay, by that analogy, local dns server determines the round-trip delay of each server by test request according to rule, thus ensure that the real-time of RTT mode, RTT arbitrarily goes up test request return time difference and adjusts, and correspondence changes with return time is different to make server precedence; ORDER forwarding server Selection Strategy is then the priority orders specifying to determine each server by user; The ratio that WEIGHT forwarding server Selection Strategy gives each given server each server of weight calculation of specifying accessed by user, height according to ratio determines priority, these three kinds of forwarding server Selection Strategies are used for different domain name mapping situations, specify the order of resolving, realize the variation of domain name mapping, make it more flexible, use more extensive.
One of ordinary skill in the art will appreciate that, the all or part of step realized in above-described embodiment method is that the hardware that can carry out instruction relevant by program has come, described program can be stored in computer read/write memory medium, this program is when performing, comprise each step of above-described embodiment method, and described storage medium can be: ROM/RAM, magnetic disc, CD, storage card etc.Therefore, relevant technical staff in the field will be understood that corresponding with method of the present invention, and the present invention also comprises a kind of based on shifty DNS repeater system simultaneously, see Fig. 2, with said method step correspondingly, this system comprises:
Creating unit, for Forward Area newly-built on local dns server;
Retransmission unit, is forwarded to given server for the domain name mapping request belonging to Forward Area client sent by local dns server;
Query unit, for inquiring about in each server whether have requested domain-name information;
Strategy dispensing unit, for according to pass-through mode and forwarding server Selection Strategy configuration Forward Area strategy, after receiving client-requested, returns forwarding analysis result according to different Forward Areas strategy.
In the present embodiment, strategy dispensing unit configuration forwarding server Selection Strategy, be configured with these strategies of first/RTT, only/RTT, no, first/ORDER, only/ORDER, first/WEIGHT, only/WEIGHT, according to different collocation strategies, obtain forwarding the result of resolving, dns server can be carried out according to the methods and strategies of specifying the parsing of domain name, thus achieve the variation of domain name mapping flow process, domain name mapping flow process is more flexible, can meet domain name mapping instructions for use more widely.
Further, retransmission unit comprises judging unit, for judging whether given server can reach.
Further, retransmission unit also comprises first retransmission unit, only retransmission unit, according to judging unit, if given server can reach, then
When adopting first retransmission unit to forward, return the domain-name information of client-requested;
When adopting only retransmission unit to forward, the response result of server is back to client;
If given server is without the domain-name information of correspondence, then
When adopting first retransmission unit to forward, carrying out recursive query, and recurrence result is returned described client;
When adopting only retransmission unit process, return corresponding type of error, local dns server stops recursive query.
Further, retransmission unit also comprises no unit, carries out recursive query, and does not adopt first or the only mode in father district, recurrence result is back to client by local dns server to the domain name mapping request that client sends.
In the present embodiment, judging unit, for judging whether given server can reach, carries out forward process according to the retransmission unit selected and judged result, ensures that each domain name resolution process is more time saving and energy saving, versatile and flexible.
Further, query unit comprises RTT query unit, ORDER query unit and WEIGHT query unit, the priority orders of transfer sequence and each application target server of forwarding server weight definition is specified respectively according to round-trip delay, user, inquire about according to priority orders, if server returns requested domain-name information, then stop inquiry; If the server failure that priority is high, then the server of a sequential query time priority.
In the present embodiment, RTT query unit adopts RTT forwarding server Selection Strategy, the shortest in limit priority with round-trip delay, by that analogy, local dns server determines the round-trip delay of each server by test request according to rule, thus ensure that the real-time of RTT mode; ORDER query unit adopts ORDER forwarding server Selection Strategy, specifies by user the priority orders determining each server; WEIGHT query unit adopts WEIGHT forwarding server Selection Strategy, the ratio that each server of weight calculation specifying to each given server by user is accessed, the height of ratio determines the order of priority, according to circumstances judge to use which kind of query unit, specify the order of resolving, realize the variation of domain name mapping, make it more flexible, use more extensive.
Compared with prior art, the invention provides a kind of shifty DNS retransmission method and system, by setting up Forward Area, configure three kinds of DNS pass-through modes: first pass-through mode, only pass-through mode and no pass-through mode, simultaneously, configure three kinds of forwarding server Selection Strategies: RTT forwarding server Selection Strategy, ORDER forwarding server Selection Strategy and WEIGHT forwarding server Selection Strategy, select first/RTT as required, only/RTT, no, first/ORDER, only/ORDER, first/WEIGHT, only/WEIGHT strategy, according to different collocation strategies, obtain forwarding the result of resolving, dns server can be carried out according to the method for specifying and order the parsing of domain name, thus achieve the variation of domain name mapping flow process, domain name mapping flow process is more flexible, domain name mapping instructions for use more widely can be met.
It should be noted that; the foregoing is only preferred embodiment of the present invention; not thereby limit scope of patent protection of the present invention, the present invention can also carry out the improvement of materials and structures to the structure of above-mentioned various parts, or adopts technically equivalent ones to replace.Therefore the equivalent structure change that all utilizations specification of the present invention and diagramatic content are done, or directly or indirectly apply to other correlative technology fields and be all in like manner all contained in the scope that the present invention contains.
Claims (10)
1. based on a shifty DNS retransmission method, it is characterized in that, described method comprises step:
S1, on local dns server newly-built Forward Area;
S2, on described Forward Area, create first, only and no tri-kinds of pass-through modes;
S3, under described first, only and no tri-kinds of pass-through modes, create RTT, ORDER and WEIGHT tri-kinds of forwarding server Selection Strategies;
S4, to configure described Forward Area strategy according to described pass-through mode and forwarding server Selection Strategy, after receiving described client domain name analysis request, return forwarding analysis result according to difference described Forward Area strategy.
2. the method for claim 1, is characterized in that, in step S2, described first pass-through mode comprises step:
S201, described local dns server receive the domain name mapping request belonging to described Forward Area that described client sends;
S202, domain name analysis request to be sent on given server, and to judge whether described server can reach;
If S203 has, then return the domain-name information of described client-requested;
If S204 nothing, then carry out recursive query, and recurrence result is returned described client.
3. the method for claim 1, is characterized in that, in step S2, described only pass-through mode comprises step:
S211, described local dns server receive the domain name mapping request belonging to described Forward Area that described client sends;
S212, domain name analysis request to be sent on given server, and to judge whether described server can reach;
If S213 has, then the response result of described server is back to described client;
If S214 nothing, then return corresponding type of error, described local dns server stops recursive query.
4. the method for claim 1, is characterized in that, in step S2, when adopting described no pass-through mode, described local dns server carries out recursive query to the domain name mapping request that described client sends, and recurrence result is back to client.
5. the method for claim 1, it is characterized in that, in step S3, when Forward Area destination server is more than 1, described RTT, ORDER and WEIGHT forwarding server Selection Strategy specifies the priority orders of transfer sequence and each application target server of forwarding server weight definition respectively according to round-trip delay, user, inquire about according to described priority orders, if described server returns requested domain-name information, then stop inquiry; If the server failure that described priority is high, then the server of a sequential query time priority.
6. based on a shifty DNS repeater system, it is characterized in that, described system comprises:
Creating unit, for Forward Area newly-built on local dns server;
Retransmission unit, is forwarded to given server for the domain name mapping request belonging to described Forward Area described client sent by described local dns server;
Query unit, for inquiring about in each server whether have requested domain-name information;
Strategy dispensing unit, for configuring described Forward Area strategy according to described pass-through mode and forwarding server Selection Strategy, after receiving described client-requested, returns forwarding analysis result according to difference described Forward Area strategy.
7. system as claimed in claim 6, it is characterized in that, described retransmission unit comprises judging unit, for judging whether described given server can reach.
8. system as claimed in claim 7, it is characterized in that, described retransmission unit also comprises first retransmission unit, only retransmission unit, according to described judging unit, if described given server can reach, then
When adopting described first retransmission unit to forward, return the domain-name information of described client-requested;
When adopting described only retransmission unit to forward, the response result of described server is back to described client;
If described given server is unreachable, then
When adopting described first retransmission unit to forward, carrying out recursive query, and recurrence result is returned described client;
When adopting described only retransmission unit process, return corresponding type of error, described local dns server stops recursive query.
9. system as claimed in claim 7, it is characterized in that, described retransmission unit also comprises no unit, by described local dns server, recursive query is carried out to the domain name mapping request that described client sends, and do not adopt first or the only mode in father district, recurrence result is back to client.
10. system as claimed in claim 6, it is characterized in that, described query unit comprises RTT query unit, ORDER query unit and WEIGHT query unit, the priority orders of transfer sequence and each application target server of forwarding server weight definition is specified respectively according to round-trip delay, user, inquire about according to described priority orders, if described server returns requested domain-name information, then stop inquiry; If the server failure that described priority is high, then the server of a sequential query time priority.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106888277A (en) * | 2017-03-07 | 2017-06-23 | 腾讯科技（深圳）有限公司 | A kind of domain name inquiry method and device |
| CN110474994A (en) * | 2018-05-10 | 2019-11-19 | 中国移动通信集团有限公司 | Domain name analytic method, device, electronic equipment and storage medium |
| CN110602264A (en) * | 2019-09-02 | 2019-12-20 | 中国移动通信集团江苏有限公司 | Method, apparatus, device and medium for transferring domain name resolution address weight information |
| CN111107081A (en) * | 2019-12-17 | 2020-05-05 | 互联网域名系统北京市工程研究中心有限公司 | DPDK-based multi-process DNS service method and system |
| CN112769976A (en) * | 2021-01-13 | 2021-05-07 | 网宿科技股份有限公司 | Domain name resolution method and system |
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| CN103051740B (en) * | 2012-12-13 | 2016-04-20 | 上海牙木通讯技术有限公司 | Domain name analytic method, dns server and domain name analysis system |
| CN103002069A (en) * | 2012-12-25 | 2013-03-27 | 北京小米科技有限责任公司 | Domain name resolution method, device and system |
| CN103905572B (en) * | 2012-12-26 | 2019-05-07 | 中国移动通信集团公司 | The processing method and processing device of domain name mapping request |
| CN104125238A (en) * | 2014-08-14 | 2014-10-29 | 互联网域名系统北京市工程研究中心有限公司 | DoS (Denial of Service) and DDoS (Distributed Denial of service) attack resisting method of DNS recursive server |
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| CN106888277A (en) * | 2017-03-07 | 2017-06-23 | 腾讯科技（深圳）有限公司 | A kind of domain name inquiry method and device |
| CN110474994A (en) * | 2018-05-10 | 2019-11-19 | 中国移动通信集团有限公司 | Domain name analytic method, device, electronic equipment and storage medium |
| CN110602264A (en) * | 2019-09-02 | 2019-12-20 | 中国移动通信集团江苏有限公司 | Method, apparatus, device and medium for transferring domain name resolution address weight information |
| CN110602264B (en) * | 2019-09-02 | 2022-05-10 | 中国移动通信集团江苏有限公司 | Method, apparatus, device and medium for transferring domain name resolution address weight information |
| CN111107081A (en) * | 2019-12-17 | 2020-05-05 | 互联网域名系统北京市工程研究中心有限公司 | DPDK-based multi-process DNS service method and system |
| CN111107081B (en) * | 2019-12-17 | 2022-01-11 | 深圳网基科技有限公司 | DPDK-based multi-process DNS service method and system |
| CN112769976A (en) * | 2021-01-13 | 2021-05-07 | 网宿科技股份有限公司 | Domain name resolution method and system |
| US11770320B2 (en) | 2021-01-13 | 2023-09-26 | Wangsu Science and Technology Co., Ltd. | Method and system for domain name resolution |
| CN112769976B (en) * | 2021-01-13 | 2023-10-24 | 网宿科技股份有限公司 | Domain name resolution method and system |
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