CN102014173A - Domain name redirecting control method, module and system - Google Patents
Domain name redirecting control method, module and system Download PDFInfo
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- CN102014173A CN102014173A CN2010105328086A CN201010532808A CN102014173A CN 102014173 A CN102014173 A CN 102014173A CN 2010105328086 A CN2010105328086 A CN 2010105328086A CN 201010532808 A CN201010532808 A CN 201010532808A CN 102014173 A CN102014173 A CN 102014173A
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Abstract
The invention discloses a domain name redirecting control method, a domain name redirecting control module and a domain name redirecting control system, which are applied in the field of Internet redirecting. The method comprises the following steps that: the domain name redirecting control module receives domain name information which is acquired from a user domain name request and sent by a domain name server (DNS) when the DNS responds to the user domain name request; and whether the received domain name information can be used for redirecting or not is judged according to the stored redirected domain name information, and the domain name accessed by a user is redirected to a corresponding Internet protocol (IP) address if that the domain name requested by the user can be used for redirecting is determined. By the method, the module and the system, the problem that an application service requested by the user is unavailable after being redirected if the application service provided by a certain domain name changes when the DNS is used for redirecting to perform separate flow guide in the prior art can be solved, the effect of redirecting according to the application of the domain name is achieved, and the phenomenon that the application service is unavailable due to the redirecting of all domain names is avoided.
Description
Technical field
The present invention relates to internet arena, relate in particular to a kind of domain name and be redirected control method, module and system.
Background technology
DNS (Domain Name System, domain name system) is a distributed data base, and the mapping between IP address and the host name (domain name) is provided.Dns resolution is a process obtaining corresponding IP address by host name (domain name).
DNS is as the important basic part of the Internet.User capture by intelligent DNS technology (being redirected is one of technology) available guiding the Internet.
Existing DNS redirecting technique is that the IP address with domain name mapping redirect to other IP address, for example:
The IP address of domain name www.sina.com.cn mapping is C, at user's ISP nearby (InternetService Provider, the ISP) server that to locate an IP address be D content stores Cache is carried out in the web service (http service or 80 port services) of www.sina.com.cn.When user capture www.sina.com.cn, the IP address that dns server provides is D, and the destination server of user capture is not the address C of the original mapping of www.sina.com.cn so, but the service that obtains is the same.
As shown in Figure 1, in the prior art, the performing step that a kind of DNS is redirected specifically comprises:
The user is when access network, and its local dns server is determined by inserting the place.Include the domain-name information of accessed content in user's request, need carry out domain name mapping.
Be implemented in wide area network (comprising the Internet) and go up flow allocating between the server of different regions, guarantee to use best server service from own nearest client, thereby guarantee to visit quality.Can comprise data such as CPU takies, bandwidth occupancy by judging the load of server, the availability of decision server can be judged the link circuit condition between user (visitor) and server simultaneously, selects the best server of link circuit condition.Therefore GSLB judges comprehensively that to server and link the server that decides by which place provides service, realizes the assurance of strange land server zone service quality.
The principle that is redirected is: GSLB equipment is determined the residing position of user according to the IP address information of subscriber's local dns server, according to the resource situation of service node, the optimal service node IP address that distance users is nearest returns to the subscriber's local dns server simultaneously;
According to foregoing description as can be known, SLB in the service node is dispatched to the buffer memory of the service equipment that provides with user's access request, but when buffer memory equipment do not provide the application of being asked (as: user capture be that telnet uses, but buffer memory equipment only provides http to use), will cause user's access services unavailable so; Thereby after causing being redirected, the user does not have access to the application of expection.
Use in the reality in the content exchange field of using DNS to be redirected to carry out the flow branch to lead, domain name such as xxxx.xxx.xx.com may provide multiple application service simultaneously.As the Telnet application service of 21 port FTP application services, 23 ports, the Http application service of 80 ports etc.And the dns resolution process can't know which application service is domain name provide, and the application service that domain name provided also is a change procedure, as domain name an application service that 21 ports are provided period, later may cancel the application service of 21 ports, and the application service of 23 ports was not provided in a period, the application service of 23 ports may be provided afterwards.When under above-mentioned situation, resolving domain name, because whole dns resolution process is to know that xxxx.xxx.xx.com provides the change of service, when the port after user capture xxxx.xxx.xx.com changes was served, the redirection scheme that prior art provided then can cause redirect services unavailable.
Summary of the invention
The invention provides a kind of domain name and be redirected control method, module and system, being used for solving prior art leads using DNS to be redirected to carry out the flow branch, if the application service that a certain domain name provides changes, the disabled problem of application service of user's request after causing being redirected.
The embodiment of the invention provides a kind of domain name to be redirected control method, comprising:
Domain name is redirected control module and receives dns server when replying user's domain name request, the domain-name information that obtains and send from user's request;
Determine according to the redirected domain-name information of preserving whether the domain-name information that receives can be used for being redirected, can be used for being redirected, then the domain name that the user visited is redirected to corresponding IP address if determine the domain name of described user's request.
Also provide a kind of domain name to be redirected control system according to the said method embodiment of the invention, this system comprises:
Dns server when being used to reply user's domain name request, obtains the domain-name information that includes accessed content in user's request, and this domain-name information is sent to GSLB equipment;
GSLB equipment, be used for determining according to the redirected domain-name information of preserving whether the domain name of described user's request can be used for being redirected, can be used for being redirected if determine the domain name of described user's request, then the domain name that the user visited is redirected to corresponding IP address according to being redirected principle.
In addition, the embodiment of the invention also provides a kind of domain name to be redirected control module, comprising:
The domain-name information receiving element is used to receive dns server when replying user's domain name request, the domain-name information that obtains and send from user's request;
Be redirected the unit, be used for determining according to the redirected domain-name information of preserving whether the domain name of described user's request can be used for being redirected, can be used for being redirected, then the domain name that the user visited is redirected to corresponding IP address if determine the domain name of described user's request.
Method provided by the invention, module and system are redirected domain-name information the domain name that needs are redirected are judged when the DNS redirect traffic, and then make domain name be redirected control module to reach the effect that the application according to domain name is redirected.Thereby reduce the disabled situation of application service of user's request after being redirected.
Description of drawings
Fig. 1 is for carrying out the flow chart that DNS is redirected in the prior art;
Fig. 2 is the flow chart that a kind of domain name of the embodiment of the invention is redirected control method;
Fig. 3 is the default flow chart that is redirected the domain name tabulation in the embodiment of the invention;
Fig. 4 is for determining the flow chart whether the domain name tabulation of IP address correspondence can be used for being redirected by application service in the embodiment of the invention;
Fig. 5 is the structural diagrams intention that a kind of domain name of the embodiment of the invention is redirected control system;
Fig. 6 is the structural representation that domain name is redirected control module in the embodiment of the invention.
Embodiment
The embodiment of the invention provides a kind of domain name to be redirected the method for control, and this method comprises: domain name is redirected control module and receives dns server when replying user's domain name request, the domain-name information that obtains and send from user's request; Determine according to the redirected domain-name information of preserving whether the domain-name information that receives can be used for being redirected, can be used for being redirected, then the domain name that the user visited is redirected to corresponding IP address if determine the domain name of described user's request.
As shown in Figure 2, the embodiment of the invention provides a kind of domain name to be redirected control method, specifically comprises step:
In embodiments of the present invention, described redirected domain-name information is kept at and is redirected in the domain name tabulation, the domain name that record is not useable for being redirected in this redirected domain name tabulation;
The specific implementation whether domain name of then definite described user's request can be used for being redirected can be:
The domain name and the described redirected domain name tabulation of user's request are mated, determine that the user asks domain name to can be used for being redirected if coupling is unsuccessful.
In embodiments of the present invention, the record domain name in the described redirected domain name tabulation comprises wide area name and meticulous domain name.
The wide area name: use asterisk wildcard that the domain name with same domain name feature is sorted out, such as, * .sina.com.cn, pop3.*.
Meticulous domain name: the domain name tabulation that finally can directly visit, such as www.sina.com.cn.
White list can use meticulous domain name also simultaneously can use the wide area name, as exist in the white list * .sina.com.cn wide area name so all subdomain names of sina.com.cn can be redirected.
Blacklist can use meticulous domain name also simultaneously can use the wide area name, if there has been * .sina.com.cn wide area name in the above-mentioned white list, and have abc.sina.com.cn in the blacklist, the effect of Chan Shenging is that other subdomain names of sina.com.cn can be redirected except abc.sina.com.cn so.
The redirected control module of domain name can be arranged among dns server or the GSLB GSLB in embodiments of the present invention, if this domain name is redirected control module and is arranged among the GSLB, then describedly the domain name that the user visited is redirected to corresponding IP address embodiment can be:
GSLB is redirected to corresponding IP address according to being redirected principle with the domain name that the user visited.
The principle that is redirected is: GSLB equipment is determined the residing position of user according to the IP address information of subscriber's local dns server, according to the resource situation of service node, the optimal service node IP address that distance users is nearest returns to the subscriber's local dns server simultaneously.
In addition because domain name quantity is huge, and clear and definite acquisition domain name which application specifically is provided is the comparison difficulty.And the application that domain name provides changes, and in order to adapt to the variation of domain name service, the embodiment of the invention also comprises:
Determine the accessed application service of the corresponding port in this IP address by the generally acknowledged port in the serve port visit data, determine the domain name that is not useable for being redirected in the corresponding domain list of file names of IP address by described application service, and use the domain name of determining and upgrade described redirected domain-name information.
Generating a concrete implementation of redirected domain name tabulation in embodiments of the present invention can be:
Mode one, service disabled situation (promptly Dui Ying domain name is not useable for being redirected) after being redirected, occurs, determine the domain name that is not useable for being redirected, definite domain name is added to during redirected domain name tabulates.
Mode two, as shown in Figure 3, the specific implementation step that generates a perfect redirected domain name tabulation specifically comprises:
Realize the concrete grammar that domain name is collected, can be: the domain name mapping log data of the dns server by gathering ISP, and analyze and propose the domain name tabulation.Analyze extraction by regular DNS log, can constantly find the new domain name of using that produces.
Step 302 determines whether comprise the domain name of collecting in the described redirected domain name tabulation, will be redirected that domain name not to be covered is divided into N group in the domain name tabulation, and is redirected to N IP address, each application server in the correspondence Cache cluster of this IP address;
In embodiments of the present invention, set each domain name of collecting and all can be redirected, after the application of user capture domain name is redirected through DNS, all be redirected to the server requests application service in the Cache cluster.
The Cache cluster of supposing ISP can provide N IP address to carry out DNS and be redirected, and this N is the bigger the better, and enough IP addresses are promptly arranged.
Domain name is divided into the N group, and the flow according to each domain name when domain name is divided into groups divides into groups, and the flow of each IP address of the standard of grouping is roughly balanced.
Step 303 is collected all serve port visit datas of N IP address;
Cause is generally acknowledged port (Well Known Ports) from 0 to 1023 in the prior art, and generally acknowledged port binding (binding) is in some services.Usually the communication of these ports has clearly shown the agreement of certain service.For example: the HTTP communication always of 80 ports.
As shown in Figure 4, in embodiments of the present invention, whether the directed specific implementation of the amount of can be used for is to determine to tabulate the domain name of IP address correspondence by application service:
Step 401 is divided into N group with the tabulation of the domain name of this IP address correspondence, and the redirected new IP address of each group, each application server in the correspondence Cache cluster of this IP address;
Step 402 is collected the serve port visit data of each IP address, determines the application service that port is accessed by the generally acknowledged port in the serve port visit data;
Step 403 determines by described application service whether the accessed application service in described IP address belongs to the expection service that can be redirected, and if not determining that then domain name is not useable for being redirected in the described IP address, and changes step 404 over to, otherwise process ends;
Step 404 determines that whether the pairing domain name number in this IP address is greater than preset threshold value, if change step 401 over to; Otherwise the domain name of determining this IP address correspondence is not useable for being redirected.
In embodiments of the present invention, when circularly domain name being divided into littler group, worst condition is domain name of each IP, general list of packets domain name number is little of certain limit, then can directly judge the domain name retargetable not in this group, or, judge the not retargetable of open-ended by the domain name of grouping is carried out the scanning of open-ended.Specific implementation can be:
If determine that the pairing domain name number in IP address is less than preset threshold value, determine whether the domain name number equals 1, be not useable for being redirected if then determine the domain name of this IP address correspondence, otherwise the serve port scanning of carrying out source mapping IP by domain name is tabulated and the open data of collection serve port; Determine the application service of domain name open-ended by generally acknowledging port; And whether the open application service of definite domain name belong to the expection service that can be redirected, if not, determine that then domain name is not useable for being redirected, otherwise determine that domain name can be used for being redirected
Described in embodiments of the present invention redirected domain name tabulation also can be set to comprise the form of blacklist and white list:
White list is included in the domain name grouping of the application of discovery retargetable, finds that the domain name of retargetable is not included into blacklist.
Be to mate blacklist earlier when being redirected the coupling domain name, and then the coupling white list.
As shown in Figure 5, also provide a kind of domain name to be redirected control system according to the said method embodiment of the invention, this system comprises: dns server 501 and GSLB equipment 502:
In addition because domain name quantity is huge, and clear and definite acquisition domain name which application specifically is provided is the comparison difficulty.And the application that domain name provides changes, and in order to adapt to the variation of domain name service, the system that the embodiment of the invention provided also comprises:
If described GSLB equipment 502 also is used for the application service that the IP address of described correspondence can not provide the user to ask, then obtains the domain name tabulation of this IP address correspondence, and collect the serve port visit data of this IP address; Determine the accessed application service of the corresponding port in this IP address by the generally acknowledged port in the serve port visit data, determine the domain name that is not useable for being redirected in the corresponding domain list of file names of IP address by described application service, and use the domain name of determining and upgrade described redirected domain-name information.
In the system that the embodiment of the invention provided, be redirected the application of domain-name information for convenience, described GSLB equipment 502 also is used for described redirected domain-name information is kept at redirected domain name tabulation, is redirected the domain name that record is not useable for being redirected in the domain name tabulation; Whether the domain name of then determining described user's request can be used for redirected comprising: the domain name and the described redirected domain name tabulation of user's request are mated, and definite user asks domain name to can be used for being redirected if coupling is unsuccessful.
As shown in Figure 6, the embodiment of the invention also provides a kind of domain name to be redirected control module, comprising:
Domain-name information receiving element 601 is used to receive dns server when replying user's domain name request, the domain-name information that obtains and send from user's request;
Be redirected unit 602, be used for determining according to the redirected domain-name information of preserving whether the domain name of described user's request can be used for being redirected, can be used for being redirected if determine the domain name of described user's request, then the domain name that the user visited is redirected to corresponding IP address.
Be redirected unit 602 and also be used for described redirected domain-name information is kept at redirected domain name tabulation, the domain name that record is not useable for being redirected in this redirected domain name tabulation; Whether the domain name of then determining described user's request can be used for redirected comprising: the domain name and the described redirected domain name tabulation of user's request are mated, and definite user asks domain name to can be used for being redirected if coupling is unsuccessful.
Because dns server and GSLB GSLB can carry out redirect operation in the application of reality,, the domain name in the embodiment of the invention can be arranged among dns server or the GSLB GSLB so being redirected control module.
The present application key problem in technology point is in DNS is redirected, before being redirected, use redirected domain-name information that domain name is classified, thereby DNS only is redirected particular application services is redirected, it is unavailable to have avoided that all domain names all are redirected the domain name service that causes.In addition, adjust being redirected the domain name tabulation, eliminate the unavailable problem of domain name service that the domain name application change produces by serve port monitoring to domain name after being redirected.
Also just because of this, the application's invention can be used on the basis that DNS redirect traffic branch is led, carry out follow-up analysis in conjunction with port to the service of using, discern application by well-known port, adjust the domain name redirection list of DNSrcsponse redirector, and then the effect that DNS can be redirected with the application that reaches according to domain name.
Method of the present invention is not limited to the embodiment described in the embodiment, and those skilled in the art's technical scheme according to the present invention draws other execution mode, belongs to technological innovation scope of the present invention equally.Obviously, those skilled in the art can carry out various changes and modification to the present invention and not break away from the spirit and scope of the present invention.Like this, if of the present invention these are revised and modification belongs within the scope of claim of the present invention and equivalent technologies thereof, then the present invention also is intended to comprise these changes and modification interior.
Claims (13)
1. a domain name is redirected control method, it is characterized in that, comprising:
Domain name is redirected control module and receives dns server when replying user's domain name request, the domain-name information that obtains and send from user's request;
Determine according to the redirected domain-name information of preserving whether the domain-name information that receives can be used for being redirected, can be used for being redirected, then the domain name that the user visited is redirected to corresponding IP address if determine the domain name of described user's request.
2. the method for claim 1 is characterized in that, the domain name that the user visited is redirected to after the IP address of correspondence, and this method also comprises:
If the application service that the IP address of described correspondence can not provide the user to ask, domain name are redirected the domain name tabulation that control module is obtained this IP address correspondence, and collect the serve port visit data of this IP address;
Determine the accessed application service of the corresponding port in this IP address by the generally acknowledged port in the serve port visit data, determine the domain name that is not useable for being redirected in the corresponding domain list of file names of IP address by described application service, and use the domain name of determining and upgrade described redirected domain-name information.
3. the method for claim 1 is characterized in that, described redirected domain-name information is kept at and is redirected in the domain name tabulation, the domain name that record is not useable for being redirected in this redirected domain name tabulation;
Domain name is redirected control module determines whether the domain name of described user's request can be used for redirected comprising:
The domain name and the described redirected domain name tabulation of user's request are mated, determine that the user asks domain name to can be used for being redirected if coupling is unsuccessful.
4. method as claimed in claim 3 is characterized in that, the record domain name in the described redirected domain name tabulation comprises wide area name and meticulous domain name.
5. method as claimed in claim 2 is characterized in that, determines that by described application service the domain name that is not useable for being redirected in the corresponding domain list of file names of IP address comprises:
A, the tabulation of the domain name of this IP address correspondence is divided into N group, and the redirected new IP address of each group, each application server in the correspondence Cache cluster of this IP address;
B, collect the serve port visit data of each IP address, determine the application service that port is accessed by the generally acknowledged port in the serve port visit data;
C, determine by described application service whether the accessed application service in described IP address belongs to the expection service that can be redirected, if not determining that then domain name is not useable for being redirected in the described IP address, and change step D over to, otherwise process ends;
D, determine that whether the pairing domain name number in this IP address is greater than preset threshold value, if change steps A over to; Otherwise the domain name of determining this IP address correspondence is not useable for being redirected.
6. method as claimed in claim 5 is characterized in that, the domain name of described definite this IP address correspondence further comprises before being not useable for being redirected:
Determine whether the domain name number equals 1, be not useable for being redirected if then determine the domain name of this IP address correspondence, otherwise the serve port scanning of carrying out source mapping IP by domain name is tabulated and the open data of collection serve port; Determine the application service of domain name open-ended by generally acknowledging port; And whether the open application service of definite domain name belong to the expection service that can be redirected, if not, determine that then domain name is not useable for being redirected, otherwise determine that domain name can be used for being redirected.
7. a domain name is redirected control system, it is characterized in that this system comprises dns server and GSLB equipment:
Dns server when being used to reply user's domain name request, obtains the domain-name information that includes accessed content in user's request, and this domain-name information is sent to GSLB equipment;
GSLB equipment, be used for determining according to the redirected domain-name information of preserving whether the domain-name information that receives can be used for being redirected, can be used for being redirected if determine the domain name of described user's request, then the domain name that the user visited is redirected to corresponding IP address according to being redirected principle.
8. system as claimed in claim 7, it is characterized in that, if described GSLB equipment also is used for the application service that the IP address of described correspondence can not provide the user to ask, then obtains the domain name tabulation of this IP address correspondence, and collect the serve port visit data of this IP address; Determine the accessed application service of the corresponding port in this IP address by the generally acknowledged port in the serve port visit data, determine the domain name that is not useable for being redirected in the corresponding domain list of file names of IP address by described application service, and use the domain name of determining and upgrade described redirected domain-name information.
9. system as claimed in claim 8 is characterized in that, described GSLB equipment also is used for described redirected domain-name information is kept at redirected domain name tabulation, the domain name that record is not useable for being redirected in this redirected domain name tabulation; Whether the domain name of then determining described user's request can be used for redirected comprising: the domain name and the described redirected domain name tabulation of user's request are mated, and definite user asks domain name to can be used for being redirected if coupling is unsuccessful.
10. a domain name is redirected control module, it is characterized in that, comprising:
The domain-name information receiving element is used to receive dns server when replying user's domain name request, the domain-name information that obtains and send from user's request;
Be redirected the unit, be used for determining according to the redirected domain-name information of preserving whether the domain name of described user's request can be used for being redirected, can be used for being redirected, then the domain name that the user visited is redirected to corresponding IP address if determine the domain name of described user's request.
11. domain name as claimed in claim 10 is redirected control module, it is characterized in that, also comprises:
Maintenance unit if be used for the application service that the IP address of described correspondence can not provide the user to ask, obtain the domain name tabulation of this IP address correspondence, and collects the serve port visit data of this IP address; Determine the accessed application service of the corresponding port in this IP address by the generally acknowledged port in the serve port visit data, determine the domain name that is not useable for being redirected in the corresponding domain list of file names of IP address by described application service, and use the domain name of determining and upgrade described redirected domain-name information.
12. domain name as claimed in claim 11 is redirected control module, it is characterized in that, redirected unit also is used for described redirected domain-name information is kept at redirected domain name tabulation, the domain name that record is not useable for being redirected in this redirected domain name tabulation; Whether the domain name of then determining described user's request can be used for redirected comprising: the domain name and the described redirected domain name tabulation of user's request are mated, and definite user asks domain name to can be used for being redirected if coupling is unsuccessful.
13. be redirected control module, it is characterized in that this domain name is redirected control module and is arranged among dns server or the GSLB GSLB as the described domain name of the arbitrary claim of claim 10～12.
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