CN108848205A - A kind of CNAME domain name analytic method for distinguishing IPv4, IPv6 - Google Patents
A kind of CNAME domain name analytic method for distinguishing IPv4, IPv6 Download PDFInfo
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- CN108848205A CN108848205A CN201810838351.8A CN201810838351A CN108848205A CN 108848205 A CN108848205 A CN 108848205A CN 201810838351 A CN201810838351 A CN 201810838351A CN 108848205 A CN108848205 A CN 108848205A
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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
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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
- H04L61/45—Network directories; Name-to-address mapping
- H04L61/4505—Network directories; Name-to-address mapping using standardised directories; using standardised directory access protocols
- H04L61/4511—Network directories; Name-to-address mapping using standardised directories; using standardised directory access protocols using domain name system [DNS]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L2101/00—Indexing scheme associated with group H04L61/00
- H04L2101/60—Types of network addresses
- H04L2101/668—Internet protocol [IP] address subnets
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L2101/00—Indexing scheme associated with group H04L61/00
- H04L2101/60—Types of network addresses
- H04L2101/686—Types of network addresses using dual-stack hosts, e.g. in Internet protocol version 4 [IPv4]/Internet protocol version 6 [IPv6] networks
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
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Abstract
A kind of CNAME domain name analytic method for distinguishing IPv4, IPv6, the domain name type according to client request inquiry are that A record or AAAA are recorded, and select IPv4 CNAME or IPv6 CNAME to be replied respectively, solve the defect that CNAME does not support multivalue simultaneously.When the domain name mapping request of client query is ANY or CNAME type, additionally it is possible to check the client source IP address in request message, and judge accordingly and IPv4 CNAME or IPv6 CNAME is selected to carry out response.The present invention is able to use the CDN server for only supporting IPv4 and/or IPv6, realizes domain name mapping for IPv4 and IPv6 user, provides consistent network access experience to different user.The method of the present invention can be applied to IPv4 into the entire long process of IPv6 transition, effectively and reasonably provide IPv6 services channels.Moreover, the present invention has only changed the solution new record configuration of domain name, there is no any change to client, good compatibility is easy to promote and utilize.
Description
Technical field
The present invention relates to a kind of CNAME domain name analytic methods for distinguishing IPv4, IPv6, belong to the skill of computer network communication
Art field.
Background technique
Domain name system DNS (Domain Name System) is a kernel service of internet, also referred to as internet
In for solving a kind of system of online machine name, it is as the distribution that can mutually map domain name and IP address
Database is able to use family and more easily accesses internet, and without spending, remember can be by IP address number that machine is directly read
Word string.Because when each host on Internet will access another host, it is necessary to know its address, ICP/IP protocol first
In IP address by four sections with " " separate 32 bit binary numbers form, memory get up can not show a candle to name facilitate and it is easy,
So just using domain name DN (Domain Name) and domain name system, domain name is by the IP where a computer or server
It is gone on address information to one group of significant character or name.Domain name system is used to manage the name and computer or server institute
IP address corresponding relationship.By domain name, the conversion process for finally obtaining IP address corresponding to the domain name is referred to as domain
Name parsing.
Generally for easy to remember, replace the node address of IP address mark computer using domain name, and by dns server Lai
Complete the parsing of domain name.Each domain name has the Authoritative DNS server of oneself, and Authoritative DNS server is equipped with the region of the domain name
File (zone file), regional document are made of multiple records, wherein common record type includes A record, AAAA note
Record, CNAME record etc..
A record is record for domain name (or host name) to be corresponded to the address IPv4, and AAAA record is for by domain name
(or host name) corresponds to the record of the address IPv6, and the Chinese translation of CNAME record is alias, the specification that is otherwise known as name；This
Kind record is commonly used in simultaneously for being mapped to same computer for domain name setting alias, i.e. by multiple names (i.e. alias)
The WWW and MAIL computer of service is provided.For example, the name (or domain name) of certain computer is " host " (A record), it is simultaneously
WWW and MAIL service is provided.It accesses and services for the ease of user.The computer has been set individually two of WWW and MAIL
CNAME：The two alias full name be exactly www beginning domain name (such as：Www.test.com domain name (the example) and with mail started
Such as：mail.test.com).In fact, the two alias all point to " host ".That is, to www.test.com and/or
The access request of mail.test.com can be resolved to host.example.com.This method can be used for working as user
When possessing multiple domain names and needing to be directed toward the same server ip address, one of domain name can be done to A record, be directed toward clothes
Business device IP address.Then other domain names are all regard as alias, in the domain name that A record is done before being directed toward, then when the user's
When server ip address changes, so that it may need not troublesomely change the direction of each domain name one by one.It only needs to change to do A record
That domain name direction, other directions using alias as domain name can also be changed to automatically in new IP address.Moreover, existing
CNAME record in technology cannot be recorded with A, AAAA record coexists, i.e., certain domain name is once provided with CNAME record, just not
A record can be set again and AAAA has recorded.
In order to solve the problems, such as to improve user because of location distribution, bandwidth and server performance bring access delay
The response speed and success rate of website are accessed, website service can all be transferred to content distributing network CDN by present large-scale website
(Content Delivery Network) service supplier carries out trustship, and specific practice is that CNAME record is added for domain name, will
CNAME record corresponds to the domain name that the CDN service supplier of trustship provides, and then user will turn the access request of the domain name
It is dealt into corresponding CDN service supplier, then characteristic information is accessed according to user by service supplier and is serviced nearby, promotes user's
Access experience.
In recent years, with the popularization of IPv6 technology, domain name can receive more and more domain name mappings from IPv6 user
Request.When using the user of IPv6 agreement to access domain name, domain name just needs to be resolved to the address IPv6.But due to domain
Name has used CDN trusteeship service, is provided with CNAME and records, so AAAA record can not be arranged again.However, current IPv6
Technology is also still to be in promote transition stage, also, this process for promoting transition is likely to a very long period.This
Outside, since the CDN service supplier of current business can not also provide the content distribution service based on IPv6 agreement, i.e. CDN service
Supplier also can not provide domain name mapping now for IPv6 user as a result, IPv6 user is caused not to be available IPv6 agreement to access
Domain name or request domain name resolution service.This seriously affects the technical bottleneck of the network access experience of IPv6 user, has become
One has the new issue of practical value very much, and a new focus of scientific and technical personnel's concern in the industry.
Summary of the invention
In view of this, the object of the present invention is to provide a kind of CNAME domain name analytic method for distinguishing IPv4, IPv6, website
The supplier of service can be used this method, at the same using only support IPv4 and/or only support IPv6 CDN server or
Using the CDN server for supporting IPv4 and IPv6 simultaneously, intelligently respectively IPv4 user and/or IPv6 user realize domain name
IPv4 parsing and IPv6 parsing provide consistent network access experience to IPv4 and/or IPv6 different user.Utilize the present invention
Method, in IPv4 to during the entire process of IPv6 transition, service supplier can effectively and reasonably provide IPv6 services channels,
It is not restricted by existing CDN service quotient IPv6 transitioning processes.
In order to achieve the above object, the present invention provides it is a kind of distinguish IPv4, IPv6 CNAME domain name analytic method,
It is characterized in that, the method includes following operative steps：
Step 1, to needing to provide domain name mapping for IPv4 and/or IPv6 user and then obtain the address IPv4 and/or IPv6
Each domain name of address resolution result is at least respectively set an IPv4CNAME record and IPv6CNAME record, then this is arranged
Domain name is N class domain name；
Step 2, when name server receives the request of the domain name mapping from user client, the domain name solution is detected first
Whether the domain name for needing to parse in analysis request message is N class domain name；If it is not, then executing traditional domain name mapping operating procedure；If
It is, then calculates and judges the domain name mapping request type in the client request message, is executed further according to judging result corresponding
Subsequent operation：
(a) if the domain name mapping request type in analysis request message is that A is recorded, subsequent step 3 is executed；
(b) if the domain name mapping request type in analysis request message is that AAAA is recorded, execution subsequent step is jumped
4；
(c) if the domain name mapping request type in analysis request message is that ANY or CNAME is recorded, and then checking should
Client source IP address type in analysis request message then executes subsequent step 3 if the address IPv4；If the address IPv6,
It then jumps and executes subsequent step 4；
If the domain name mapping request (d) in analysis request message is the other types of non-above-mentioned four seed type, biography is executed
The domain name mapping operating procedure of system；
Step 3, name server is that client return A records corresponding IPv4CNAME record；
Step 4, name server is that client return AAAA records corresponding IPv6CNAME record；
Step 5, after client receives the response message of name server, continue the CNAME note into the response message
Domain name analysis request is initiated in record；Then, by content distributing network CDN (Content Delivery Network) service supplier
Traditional subsequent domain name resolution service is provided.
A kind of the advantages of CNAME domain name analytic method of differentiation IPv4, IPv6 of the present invention and effect are：
The method of the present invention, which preferably solves current CDN service provider, can not parse the domain IPv6 because of technical restriction
Name still has already appeared the pressing needs problem that many users wish owner's offer IPv6 domain name resolution service of website.Such as
Fruit CDN service provider is still not able to support the parsing demand of IPv6 domain name, and the owner of website both can be using the present invention
Method additionally selects self-built domain name mapping approach, also can choose using the method for the present invention and support IPv6 to parse other
CDN service provider provides IPv6 domain name resolution service, to provide the domain name mapping of IPv4 and/or IPv6 simultaneously to user
Service.
The method of the present invention is to have changed the solution new record configuration of domain name, without making any change to client, thus it is simultaneous
Capacitive is good, easy to promote and utilize.
The application of the method for the present invention will facilitate and speed up the popularization and application of the IPv6 technology in IPv6 transition stage, and
The domain name solution of IPv6 is provided for the existing domain name resolution service based on IPv4, in particular by CDN content distribution network
Analysis service.
A kind of crucial innovative technology of CNAME domain name analytic method for distinguishing IPv4, IPv6 of the present invention is：
It is that A record or AAAA are recorded that the method for the present invention, which is according to the domain name mapping request type of client query, so as to
Selection IPv4CNAME record or IPv6CNAME record carry out reply response respectively, so that solving CNAME record cannot be same
When support multivalue the problem of.
The method of the present invention, can be further when the domain name mapping request type of client query is that ANY or CNAME is recorded
Check the client source IP address inquired in the domain name mapping request message, so that its network protocol supported is judged accordingly, needle
IPv4CNAME record or IPv6CNAME record is selected property to carry out reply response.
The present invention can support the many-valued analytic of same network protocol domain name mapping request type simultaneously：When a domain name
It, can be according to weight, poll or a variety of sides such as random when being recorded with multiple IPv4CNAME record or multiple IPv6CNAME
Method, the equally loaded between multiple CDN service providers.
Detailed description of the invention
Fig. 1 is a kind of CNAME domain name analytic method operating procedure flow chart for distinguishing IPv4, IPv6 of the present invention.
Specific embodiment
To make the object, technical solutions and advantages of the present invention clearer, the present invention is made with reference to the accompanying drawing further
Detailed description.
Referring to Fig. 1, a kind of concrete operation step for the CNAME domain name analytic method for distinguishing IPv4, IPv6 of the present invention is introduced：
Step 1, for need to provide for IPv4 and/or IPv6 user domain name mapping, and then obtain the address IPv4 and/or
Each domain name of IPv6 address resolution result is at least respectively set an IPv4CNAME record and IPv6CNAME record, then sets
Setting the domain name is N class domain name.
It is right if IPv4CNAME record and/or IPv6CNAME record have 2 or 2 or more in the operating procedure
Record selection algorithm, the record selection algorithm packet is respectively set in every class 2 or 2 therein or more multiple CNAME records
It includes：The selection algorithm of random disorder selection, weight proportion selection or poll selection.
Step 2, when name server receives the request of the domain name mapping from user client, the domain name solution is detected first
Whether the domain name for needing to parse in analysis request message is N class domain name；
If it is not, then executing traditional domain name mapping operating procedure；
If so, calculating and judging the domain name mapping request type in the client request message, further according to judging result
Execute corresponding subsequent operation：
(a) if the domain name mapping request type in analysis request message is that A is recorded, subsequent step 3 is executed；
(b) if the domain name mapping request type in analysis request message is that AAAA is recorded, execution subsequent step is jumped
4；
(c) if the domain name mapping request type in analysis request message is that ANY or CNAME is recorded, and then checking should
Client source IP address type in analysis request message then executes subsequent step 3 if the address IPv4；If the address IPv6,
It then jumps and executes subsequent step 4；
If the domain name mapping request (d) in analysis request message is the other types of non-above-mentioned four seed type, biography is executed
The domain name mapping operating procedure of system.
Step 3, name server is that client return A records corresponding IPv4CNAME record；If corresponding
When IPv4CNAME record there are 2 or 2 or more, the record selection algorithm according to setting is needed, a record therein is selected to give
With response.
Step 4, name server is that client return AAAA records corresponding IPv6CNAME record；If corresponding
When IPv6CNAME record there are 2 or 2 or more, the record selection algorithm according to setting is needed, a record therein is selected to give
With response.
Step 5, after client receives the response message of name server, continue the CNAME note into the response message
Domain name analysis request is initiated in record；Then, by content distributing network CDN (Content Delivery Network) service supplier
Traditional subsequent domain name resolution service is provided.
Inventions have been emulation embodiment tests to apply：In the homepage www.wrdtech.com of net Rui Da company
It is middle that domain name mapping is carried out using domain name analytic method of the invention, i.e., two CNAME are provided in domain name www.wrdtech.com
Record.Wherein, it is recorded as www4.wrdtech.com for the CNAME of IPv4, is recorded as the CNAME of IPv6
www6.wrdtech.com.The AAAA record of domain name www6.wrdtech.com is set as 2001:da8:215::1.Realize to
IPv4 client and IPv6 client return to the hope of different parsing results respectively.It is tested by the implementation up to more than ten weeks, this
The CNAME domain name analytic method of differentiation IPv4, IPv6 of invention are successfully, to realize goal of the invention, be expected to further genralrlization
Using.
Claims (4)
1. a kind of CNAME domain name analytic method for distinguishing IPv4, IPv6, which is characterized in that the method includes following operation steps
Suddenly：
Step 1, to needing to provide domain name mapping for IPv4 and/or IPv6 user and then obtain the address IPv4 and/or the address IPv6
Each domain name of parsing result is at least respectively set an IPv4 CNAME record and IPv6 CNAME record, then the domain is arranged
Entitled N class domain name；
Step 2, when name server receives the request of the domain name mapping from user client, the domain name mapping is detected first and is asked
Ask whether the domain name for needing to parse in message is N class domain name；If it is not, then executing traditional domain name mapping operating procedure；If so,
It calculates and judges the domain name mapping request type in the client request message, execute corresponding subsequent behaviour further according to judging result
Make：
(a) if the domain name mapping request type in analysis request message is that A is recorded, subsequent step 3 is executed；
(b) if the domain name mapping request type in analysis request message is that AAAA is recorded, jumps and execute subsequent step 4；
(c) if the domain name mapping request type in analysis request message is that ANY or CNAME is recorded, and then check the parsing
Client source IP address type in request message then executes subsequent step 3 if the address IPv4；If the address IPv6, then jump
Turn to execute subsequent step 4；
If the domain name mapping request (d) in analysis request message is the other types of non-above-mentioned four seed type, execute traditional
Domain name mapping operating procedure；
Step 3, name server is that client return A records corresponding IPv4 CNAME record；
Step 4, name server is that client return AAAA records corresponding IPv6 CNAME record；
Step 5, after client receives the response message of name server, continue the CNAME record hair into the response message
Play domain name mapping request；Then, it is provided by content distributing network CDN (Content Delivery Network) service supplier
Traditional subsequent domain name resolution service.
2. according to the method described in claim 1, it is characterized in that：In the step 1, if IPv4 CNAME record and/or
When IPv6 CNAME record there are 2 or 2 or more, difference is recorded to every class 2 or 2 therein or more multiple CNAME
Setting record selection algorithm, the record selection algorithm include：Random disorder selection, weight proportion selection or poll selection
Selection algorithm.
3. according to the method described in claim 2, it is characterized in that：In the step 3, if corresponding IPv4 CNAME is recorded
When there are 2 or 2 or more, the record selection algorithm according to setting is needed, a record therein is selected to give response.
4. according to the method described in claim 2, it is characterized in that：In the step 4, if corresponding IPv6 CNAME is recorded
When there are 2 or 2 or more, the record selection algorithm according to setting is needed, a record therein is selected to give response.
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| CN109547583A (en) * | 2018-11-22 | 2019-03-29 | 中国移动通信集团江苏有限公司 | Domain name resources querying method, device, equipment and computer storage medium |
| CN110809070A (en) * | 2019-11-12 | 2020-02-18 | 睿哲科技股份有限公司 | Website domain name resolution record processing method and device, electronic equipment and storage medium |
| CN110995888A (en) * | 2019-12-17 | 2020-04-10 | 互联网域名系统北京市工程研究中心有限公司 | Intelligent resolution method of domain name system |
| CN111010462A (en) * | 2019-12-30 | 2020-04-14 | 互联网域名系统北京市工程研究中心有限公司 | IPv6 domain name resolution method based on TRANS record |
| CN111147621A (en) * | 2019-12-30 | 2020-05-12 | 互联网域名系统北京市工程研究中心有限公司 | Method for supporting IPv6 service access of external network user |
| CN111416884A (en) * | 2020-03-12 | 2020-07-14 | 苏州浪潮智能科技有限公司 | CTDB virtual IP allocation method and device and distributed storage equipment |
| CN111447297A (en) * | 2020-03-20 | 2020-07-24 | 福建万物易联网络科技有限公司 | IPv4 and IPv6 DNS unified access management method and system |
| CN115801730A (en) * | 2022-11-28 | 2023-03-14 | 中国科学院信息工程研究所 | IPv6 parser association discovery method and system |
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| CN111447297A (en) * | 2020-03-20 | 2020-07-24 | 福建万物易联网络科技有限公司 | IPv4 and IPv6 DNS unified access management method and system |
| CN111447297B (en) * | 2020-03-20 | 2021-10-15 | 福建万物易联网络科技有限公司 | IPv4 and IPv6 DNS unified access management method and system |
| CN115801730A (en) * | 2022-11-28 | 2023-03-14 | 中国科学院信息工程研究所 | IPv6 parser association discovery method and system |
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