CN113301176A - Domain name resolution method and device for content distribution network, electronic equipment and medium - Google Patents
Domain name resolution method and device for content distribution network, electronic equipment and medium Download PDFInfo
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- CN113301176A CN113301176A CN202011263371.0A CN202011263371A CN113301176A CN 113301176 A CN113301176 A CN 113301176A CN 202011263371 A CN202011263371 A CN 202011263371A CN 113301176 A CN113301176 A CN 113301176A
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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]
Abstract
The embodiment of the disclosure discloses a domain name resolution method, a domain name resolution device, electronic equipment and a medium of a content distribution network, wherein the method comprises the following steps: receiving a first domain name resolution request message sent by a client through a first Domain Name System (DNS) server, wherein the first domain name resolution request message requests to resolve a first domain name; sending, by the first DNS server, the first domain name resolution request message to a second DNS server; acquiring a second domain name resolution response message through the second DNS, wherein the second domain name resolution response message contains a network address corresponding to a second domain name, and the second domain name is a corresponding domain name of the first domain name in a content distribution network; sending, by the second DNS server, the second domain name resolution response message to the first DNS server; and sending the second domain name resolution response message to the client through the first DNS server as a response to the first domain name resolution request message.
Description
Technical Field
The present disclosure relates to the field of computer technologies, and in particular, to a method and an apparatus for domain name resolution in a content distribution network, an electronic device, and a readable storage medium.
Background
A CDN (Content Delivery Network) is an intelligent virtual Network constructed on the basis of an existing Network, and by means of edge servers deployed in various places, users can obtain required Content nearby through functional modules of load balancing, Content Delivery, scheduling, and the like of a central platform, so that Network congestion is reduced, and the access response speed and hit rate of the users are improved.
The DNS (Domain Name System) is a distributed network directory service, and is mainly used for interconversion between a Domain Name and an ip (internet protocol) address.
According to the traditional CDN access approach, assume that the original domain name is a.com, where the resolution of a.com is on the authoritative DNS of a.com (in fact, a typical customer would host domain name resolution on the authoritative DNS of some cloud vendors). If a.com uses the CDN, it is assigned a domain name cname in the CDN network, such as a.com.b.com, where the resolution of a.com.b.com is on the authoritative DNS of the CDN.
When a client of an end user requests to analyze a.com, the client of the end user initiates an analysis request of the a.com to a recursive server of the client, the recursive server requests to analyze the a.com to an authoritative DNS server of the a.com, the authoritative DNS server of the a.com analyzes the cname: com.b.com, return it to the recursive server. Then, the recursion server requests the authoritative DNS server of the a.com.b.com to analyze the a.com.b.com, the latter analyzes the IP address of the server of the CDN of the a.com and returns the IP address to the recursion server, the recursion server returns the IP address of the server of the CDN of the a.com to the client, and the client initiates a request to the returned IP address to obtain the service.
Disclosure of Invention
In order to solve the problems in the related art, embodiments of the present disclosure provide a domain name resolution method and apparatus for a content distribution network, an electronic device, and a readable storage medium.
In a first aspect, an embodiment of the present disclosure provides a domain name resolution method, including:
receiving a first domain name resolution request message sent by a client through a first Domain Name System (DNS) server, wherein the first domain name resolution request message requests to resolve a first domain name;
sending, by the first DNS server, the first domain name resolution request message to a second DNS server;
acquiring a second domain name resolution response message through the second DNS, wherein the second domain name resolution response message contains a network address corresponding to a second domain name, and the second domain name is a corresponding domain name of the first domain name in a designated network;
sending, by the second DNS server, the second domain name resolution response message to the first DNS server;
and sending the second domain name resolution response message to the client through the first DNS server as a response to the first domain name resolution request message.
With reference to the first aspect, in a first implementation manner of the first aspect, the obtaining, by the second DNS server, a second domain name resolution response message includes:
sending a second domain name resolution request message to a third DNS server through the second DNS server, wherein the second domain name resolution request message requests to resolve the second domain name;
receiving, by the second DNS server, the second domain name resolution response message from the third DNS server.
With reference to the first implementation manner of the first aspect, in a second implementation manner of the first aspect, the method further includes:
and analyzing the second domain name through the third DNS server to obtain the network address.
With reference to the first aspect, the present disclosure is in a third implementation manner of the first aspect, wherein:
the first DNS server is a recursive DNS server of the client, the second DNS server is an authoritative DNS server of the first domain name, and the third DNS server is an authoritative DNS server of the second domain name;
the specified network is a content distribution network;
the first domain name is a public network domain name.
In a second aspect, an embodiment of the present disclosure provides a domain name resolution method, used for a first DNS server, where the method includes:
receiving a first domain name resolution request message sent by a client, wherein the first domain name resolution request message requests to resolve a first domain name;
sending the first domain name resolution request message to a second DNS server;
receiving a second domain name resolution response message from the second DNS server, the second domain name resolution response message including a network address corresponding to a second domain name, the second domain name being a corresponding domain name of the first domain name in the designated network;
and sending the second domain name resolution response message to the client as a response to the first domain name resolution request message.
With reference to the second aspect, in a first implementation manner of the second aspect, the second domain name resolution response message is received from a third DNS server after the second DNS server sends a second domain name resolution request message to the third DNS server, where the second domain name resolution request message requests resolution of a second domain name.
With reference to the first implementation manner of the second aspect, in a second implementation manner of the second aspect, the network address is obtained by resolving the second domain name through the third DNS server.
With reference to the first implementation manner of the second aspect, the present disclosure provides in a third implementation manner of the second aspect:
the first DNS server is a recursive DNS server of the client, the second DNS server is an authoritative DNS server of the first domain name, and the third DNS server is an authoritative DNS server of the second domain name;
the specified network is a content distribution network;
the first domain name is a public network domain name.
In a third aspect, an embodiment of the present disclosure provides a domain name resolution method, used in a second DNS server, where the method includes:
receiving a first domain name resolution request message sent by a first DNS server, wherein the first domain name resolution request message requests to resolve a first domain name;
and sending a second domain name resolution response message to the first DNS server as a response to the first domain name resolution request message, wherein the second domain name resolution response message contains a network address corresponding to a second domain name, and the second domain name is a corresponding domain name of the first domain name in a specified network.
With reference to the third aspect, in a first implementation manner of the third aspect, the method further includes:
sending a second domain name resolution request message to a third DNS server, wherein the second domain name resolution request message requests to resolve the second domain name;
receiving, by the second DNS server, the second domain name resolution response message from the third DNS server.
With reference to the first implementation manner of the third aspect, in a second implementation manner of the third aspect, the network address is obtained by resolving the second domain name through the third DNS server.
With reference to the first implementation manner of the third aspect, the present disclosure provides in a third implementation manner of the third aspect:
the first domain name resolution request message is received by the first DNS server from a client;
the first DNS server is a recursive DNS server of the client, the second DNS server is an authoritative DNS server of the first domain name, and the third DNS server is an authoritative DNS server of the second domain name;
the specified network is a content distribution network;
the first domain name is a public network domain name.
In a fourth aspect, an embodiment of the present disclosure provides a domain name resolution method, used in a third DNS server, where the method includes:
receiving a second domain name resolution request message from a second DNS server, wherein the second DNS server receives a first domain name resolution request message from a first DNS server and generates the second domain name resolution request message according to the first domain name resolution request message, the first domain name resolution request message requests resolution of a first domain name, the second domain name resolution request message requests resolution of a second domain name, and the second domain name is a domain name corresponding to the first domain name in an appointed network;
sending a second domain name resolution response message to the second DNS server, the second domain name resolution response message including a network address corresponding to a second domain name.
With reference to the fourth aspect, in a first implementation manner of the fourth aspect, the method further includes:
and analyzing the second domain name to obtain the network address.
With reference to the fourth aspect, the present disclosure provides in a second implementation manner of the fourth aspect:
the first domain name resolution request message is received by the first DNS server from a client;
the first DNS server is a recursive DNS server of the client, the second DNS server is an authoritative DNS server of the first domain name, and the third DNS server is an authoritative DNS server of the second domain name;
the specified network is a content distribution network;
the first domain name is a public network domain name.
In a fifth aspect, an embodiment of the present disclosure provides a domain name resolution device, configured to a first DNS server, where the device includes:
the first receiving module is configured to receive a first domain name resolution request message sent by a client, wherein the first domain name resolution request message requests to resolve a first domain name;
a first sending module configured to send the first domain name resolution request message to a second DNS server;
a second receiving module configured to receive a second domain name resolution response message from the second DNS server, the second domain name resolution response message including a network address corresponding to a second domain name, the second domain name being a corresponding domain name of the first domain name in the specified network;
a second sending module configured to send the second domain name resolution response message to the client as a response to the first domain name resolution request message.
In a sixth aspect, an embodiment of the present disclosure provides a domain name resolution apparatus, where the apparatus is used for a second DNS server, and the apparatus includes:
a third receiving module, configured to receive a first domain name resolution request message sent by a first DNS server, where the first domain name resolution request message requests to resolve a first domain name;
a third sending module configured to send a second domain name resolution response message to the first DNS server as a response to the first domain name resolution request message, the second domain name resolution response message including a network address corresponding to a second domain name, the second domain name being a domain name corresponding to the first domain name in a specified network.
In a seventh aspect, an embodiment of the present disclosure provides a domain name resolution device, where the domain name resolution device is used in a third DNS server, and the device includes:
a fifth receiving module, configured to receive a second domain name resolution request message from a second DNS server, where the second DNS server receives a first domain name resolution request message from a first DNS server and generates the second domain name resolution request message according to the first domain name resolution request message, the first domain name resolution request message requests resolution of a first domain name, the second domain name resolution request message requests resolution of a second domain name, and the second domain name is a domain name corresponding to the first domain name in a specified network;
a fifth sending module configured to send a second domain name resolution response message to the second DNS server, the second domain name resolution response message including a network address corresponding to a second domain name.
In an eighth aspect, an embodiment of the present disclosure provides a domain name resolution method for a content distribution network, including: receiving a first domain name resolution request message sent by a client through a first Domain Name System (DNS) server, wherein the first domain name resolution request message requests to resolve a first domain name; sending, by the first DNS server, the first domain name resolution request message to a second DNS server; acquiring a second domain name resolution response message through the second DNS, wherein the second domain name resolution response message contains a network address corresponding to a second domain name, and the second domain name is a corresponding domain name of the first domain name in a content distribution network; sending, by the second DNS server, the second domain name resolution response message to the first DNS server; and sending the second domain name resolution response message to the client through the first DNS server as a response to the first domain name resolution request message.
In a ninth aspect, the present disclosure provides an electronic device, including a memory and a processor, wherein the memory is configured to store one or more computer instructions, and wherein the one or more computer instructions are executed by the processor to implement the method according to any one of the second implementation manners of the second aspect to the fourth aspect.
In a tenth aspect, an embodiment of the present disclosure provides a computer-readable storage medium having stored thereon computer instructions, which, when executed by a processor, implement the method according to any one of the second implementation manners of the second aspect to the fourth aspect.
According to the technical scheme provided by the embodiment of the disclosure, a first Domain Name System (DNS) server is used for receiving a first domain name resolution request message sent by a client, wherein the first domain name resolution request message requests to resolve a first domain name; sending, by the first DNS server, the first domain name resolution request message to a second DNS server; acquiring a second domain name resolution response message through the second DNS, wherein the second domain name resolution response message contains a network address corresponding to a second domain name, and the second domain name is a corresponding domain name of the first domain name in a designated network; sending, by the second DNS server, the second domain name resolution response message to the first DNS server; and sending the second domain name resolution response message to the client through the first DNS server as a response to the first domain name resolution request message. According to the domain name resolution method of the embodiment of the disclosure, the second DNS server directly resolves the network address of the first domain name in the designated network according to the configuration of the second domain name corresponding to the first domain name in the designated network, and hides the processes of generating and resolving the cName in the middle, thereby reducing the DNS resolution time, improving the domain name resolution availability and reducing the possibility of being interfered by a public network.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.
Drawings
Other features, objects, and advantages of the present disclosure will become more apparent from the following detailed description of non-limiting embodiments when taken in conjunction with the accompanying drawings. In the drawings:
fig. 1 shows a prior art domain name resolution process.
Fig. 2 shows a flow diagram of a domain name resolution method according to an embodiment of the present disclosure.
Fig. 3 illustrates a domain name resolution process according to an embodiment of the present disclosure.
Fig. 4 shows a flowchart of a domain name resolution method for a first DNS server according to an embodiment of the present disclosure.
Fig. 5 shows a flowchart of a domain name resolution method for a second DNS server according to an embodiment of the present disclosure.
Fig. 6 shows a flowchart of a domain name resolution method for a third DNS server according to an embodiment of the present disclosure.
Fig. 7 shows a block diagram of a domain name resolution device for a first DNS server according to an embodiment of the present disclosure.
Fig. 8 shows a block diagram of a domain name resolution device for a second DNS server according to an embodiment of the present disclosure.
Fig. 9 illustrates a block diagram of a domain name resolution device for a third DNS server according to an embodiment of the present disclosure.
Fig. 10 shows a block diagram of an electronic device according to an embodiment of the present disclosure.
FIG. 11 shows a schematic block diagram of a computer system suitable for use in implementing a method according to an embodiment of the present disclosure.
Fig. 12 shows a schematic diagram of a domain name resolution system according to an embodiment of the present disclosure.
Detailed Description
Hereinafter, exemplary embodiments of the present disclosure will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily implement them. Also, for the sake of clarity, parts not relevant to the description of the exemplary embodiments are omitted in the drawings.
In the present disclosure, it is to be understood that terms such as "including" or "having," etc., are intended to indicate the presence of the disclosed features, numbers, steps, behaviors, components, parts, or combinations thereof, and are not intended to preclude the possibility that one or more other features, numbers, steps, behaviors, components, parts, or combinations thereof may be present or added.
It should be further noted that the embodiments and features of the embodiments in the present disclosure may be combined with each other without conflict. The present disclosure will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
In the present disclosure, the acquisition of the user information or the user data is an operation that is authorized, confirmed, or actively selected by the user.
In making the present disclosure, the inventors discovered that the resolution process of DNS adds at least one layer of cname when using a CDN to provide a service. Some CDN vendors may have one more tier of cnames due to some regulatory requirements. The probability of failure of DNS resolution or hijacking or interference on the public network is increased every time a layer of cname is added. Meanwhile, after one more layer of cname is added, when the recursive DNS server performs query, the query must be performed once more, which consumes more DNS resolution time.
Fig. 1 shows a prior art domain name resolution process.
As shown in fig. 1, the client sends a resolution request for the domain name a.com to the recursive DNS server. The recursive DNS server sends the request to the authoritative DNS server of a.com, which returns the corresponding domain name a.com.b.com of a.com in the CDN network to the recursive DNS server. The recursive DNS server sends the domain name a.com.b.com to the authoritative DNS server of the domain name a.com.b.com for resolution, which resolves to get two IP addresses 108.40.18.190 and 108.40.18.191, which are returned to the recursive DNS server. Both IP addresses 108.40.18.190 and 108.40.18.191 are addresses in the CDN network for providing a.com services, and clients may request services for either address. The recursive DNS server returns two IP addresses 108.40.18.190 and 108.40.18.191 to the client, which can request a.com services through either of the two IP addresses.
As described above, when using a CDN to provide services, the resolution process of the DNS is increased by at least one layer of cname. The probability of failure of DNS resolution or hijacking or interference on the public network is increased every time a layer of cname is added. Meanwhile, after one more layer of cname is added, when the recursive DNS server performs query, the query must be performed once more, which consumes more DNS resolution time.
Fig. 2 shows a flow diagram of a domain name resolution method according to an embodiment of the present disclosure. As shown in fig. 2, the domain name resolution method includes the following steps S201 to S205:
in step S201, a first domain name resolution request message sent by a client is received through a first domain name system DNS server, where the first domain name resolution request message requests resolution of a first domain name;
in step S202, sending the first domain name resolution request message to a second DNS server through the first DNS server;
in step S203, a second domain name resolution response message is obtained through the second DNS server, where the second domain name resolution response message includes a network address corresponding to a second domain name, and the second domain name is a domain name corresponding to the first domain name in the designated network;
in step S204, sending the second domain name resolution response message to the first DNS server through the second DNS server;
in step S205, the second domain name resolution response message is sent to the client through the first DNS server as a response to the first domain name resolution request message.
According to the domain name resolution method of the embodiment of the disclosure, the second DNS server directly resolves the network address of the first domain name in the designated network according to the configuration of the second domain name corresponding to the first domain name in the designated network, and hides the processes of generating and resolving the cName in the middle, thereby reducing the DNS resolution time, improving the domain name resolution availability and reducing the possibility of being interfered by a public network.
According to an embodiment of the present disclosure, the obtaining, by the second DNS server, a second domain name resolution response message includes:
sending a second domain name resolution request message to a third DNS server through the second DNS server, wherein the second domain name resolution request message requests to resolve the second domain name;
receiving, by the second DNS server, the second domain name resolution response message from the third DNS server.
According to the embodiment of the disclosure, the second domain name is resolved by the third DNS server to obtain the network address.
According to an embodiment of the present disclosure, the first DNS server is a recursive DNS server of the client, the second DNS server is an authoritative DNS server of the first domain name, and the third DNS server is an authoritative DNS server of the second domain name; the specified network is a content distribution network; the first domain name is a public network domain name.
According to an embodiment of the present disclosure, the designated network may also be any one of the following networks: virtual network, public cloud network, private cloud network, local area network.
When the designated network is a CDN network, an embodiment of the present disclosure provides a domain name resolution method for a content delivery network, including: receiving a first domain name resolution request message sent by a client through a first Domain Name System (DNS) server, wherein the first domain name resolution request message requests to resolve a first domain name; sending, by the first DNS server, the first domain name resolution request message to a second DNS server; acquiring a second domain name resolution response message through the second DNS, wherein the second domain name resolution response message contains a network address corresponding to a second domain name, and the second domain name is a corresponding domain name of the first domain name in a content distribution network; sending, by the second DNS server, the second domain name resolution response message to the first DNS server; and sending the second domain name resolution response message to the client through the first DNS server as a response to the first domain name resolution request message.
Fig. 3 illustrates a domain name resolution process according to an embodiment of the present disclosure.
As shown in fig. 3, the client sends a first domain name resolution request message to a first DNS server, which may be, for example, the public network domain name abc. Com, the first DNS server sends the first domain name resolution request message to a second DNS server, e.g., an authoritative DNS server of abc. Com, when the owner of the first domain name abc.com authorizes the second DNS server to read a resolution record of the first domain name abc.com on a corresponding second domain name abc.com.def.com on a third DNS server (e.g. an authoritative DNS server for the second domain name abc.com.def.com), the second DNS server sends a second domain name resolution request message to the third DNS server requesting resolution of the second domain name abc.com.def.com. The third DNS server sends the result of the resolution of the second domain name abc.com.def.com (e.g., network addresses 106.33.185.170 and 106.33.185.171 of abc.com in the specified network) to the first DNS server through a second domain name resolution response message. Com, the first DNS server sends a second domain name resolution response message to the client so that the client can request service of abc.com according to any of the network addresses 106.33.185.170 and 106.33.185.171.
Alternatively, according to an embodiment of the present disclosure, the domain name resolution result of a.com may be set as network addresses 106.33.185.170 and 106.33.185.171 on the second DNS server. At this time, the second DNS does not need to communicate with the third DNS server, but may directly acquire the network addresses 106.33.185.170 and 106.33.185.171 locally and return the network addresses 106.33.185.170 and 106.33.185.171 to the client through the second domain name resolution response message, thereby further reducing the number of network communications and improving the resolution speed.
Fig. 4 shows a flowchart of a domain name resolution method for a first DNS server according to an embodiment of the present disclosure.
As shown in fig. 4, a domain name resolution method for a first DNS server includes steps S401 to S404:
in step S401, a first domain name resolution request message sent by a client is received, where the first domain name resolution request message requests resolution of a first domain name;
in step S402, sending the first domain name resolution request message to a second DNS server;
in step S403, receiving a second domain name resolution response message from the second DNS server, where the second domain name resolution response message includes a network address corresponding to a second domain name, and the second domain name is a corresponding domain name of the first domain name in a specified network;
in step S404, the second domain name resolution response message is sent to the client as a response to the first domain name resolution request message.
According to an embodiment of the present disclosure, the second domain name resolution response message is received from a third DNS server after the second DNS server sends a second domain name resolution request message to the third DNS server, where the second domain name resolution request message requests resolution of a second domain name.
According to the embodiment of the present disclosure, the network address is obtained by analyzing the second domain name through the third DNS server.
According to an embodiment of the present disclosure, wherein:
the first DNS server is a recursive DNS server of the client, the second DNS server is an authoritative DNS server of the first domain name, and the third DNS server is an authoritative DNS server of the second domain name;
the specified network is a content distribution network;
the first domain name is a public network domain name.
For example, referring to fig. 3, a first DNS server receives a first domain name resolution request message sent by a client, where the first domain name resolution request message requests to resolve a first domain name abc. The first DNS server sends the first domain name resolution request message to a second DNS server. The first DNS server receives a second domain name resolution response message from the second DNS server, the second domain name resolution response message containing the network addresses 106.33.185.170 and 106.33.185.171 corresponding to a second domain name abc.com.def.com, which is the corresponding domain name of the first domain name in the specified network. And the first DNS server sends the second domain name resolution response message to the client as a response to the first domain name resolution request message.
According to an embodiment of the present disclosure, the second domain name resolution response message is received from a third DNS server after the second DNS server sends a second domain name resolution request message to the third DNS server, wherein the second domain name resolution request message requests resolution of a second domain name abc.
According to an embodiment of the present disclosure, the network addresses 106.33.185.170 and 106.33.185.171 are resolved by the third DNS server to the second domain name abc.
According to the domain name resolution method of the embodiment of the disclosure, the second DNS server directly resolves the network address of the first domain name in the designated network according to the configuration of the second domain name corresponding to the first domain name in the designated network, and hides the processes of generating and resolving the cName in the middle, thereby reducing the DNS resolution time, improving the domain name resolution availability and reducing the possibility of being interfered by a public network.
Fig. 5 shows a flowchart of a domain name resolution method for a second DNS server according to an embodiment of the present disclosure.
As shown in fig. 5, a domain name resolution method for a second DNS server includes steps S501 to S502:
in step S501, a first domain name resolution request message sent by a first DNS server is received, where the first domain name resolution request message requests to resolve a first domain name;
in step S502, a second domain name resolution response message is sent to the first DNS server as a response to the first domain name resolution request message, where the second domain name resolution response message includes a network address corresponding to a second domain name, and the second domain name is a domain name corresponding to the first domain name in a specified network.
According to an embodiment of the present disclosure, the domain name resolution method for the second DNS server further includes:
sending a second domain name resolution request message to a third DNS server, wherein the second domain name resolution request message requests to resolve the second domain name;
receiving, by the second DNS server, the second domain name resolution response message from the third DNS server.
According to the embodiment of the present disclosure, the network address is obtained by analyzing the second domain name through the third DNS server.
According to an embodiment of the present disclosure, wherein:
the first domain name resolution request message is received by the first DNS server from a client;
the first DNS server is a recursive DNS server of the client, the second DNS server is an authoritative DNS server of the first domain name, and the third DNS server is an authoritative DNS server of the second domain name;
the specified network is a content distribution network;
the first domain name is a public network domain name.
As shown in fig. 3, the second DNS server receives a first domain name resolution request message sent by the first DNS server, where the first domain name resolution request message requests to resolve a first domain name abc. The second DNS server sends a second domain name resolution response message to the first DNS server as a response to the first domain name resolution request message, the second domain name resolution response message containing network addresses 106.33.185.170 and 106.33.185.171 corresponding to a second domain name, the second domain name being a corresponding domain name of the first domain name in the specified network.
According to the domain name resolution method of the embodiment of the disclosure, the second DNS server directly resolves the network address of the first domain name in the designated network according to the configuration of the second domain name corresponding to the first domain name in the designated network, and hides the processes of generating and resolving the cName in the middle, thereby reducing the DNS resolution time, improving the domain name resolution availability and reducing the possibility of being interfered by a public network.
Fig. 6 shows a flowchart of a domain name resolution method for a third DNS server according to an embodiment of the present disclosure.
As shown in fig. 6, a domain name resolution method for a third DNS server includes steps S601 to S602:
in step S601, a second domain name resolution request message is received from a second DNS server, where the second DNS server receives a first domain name resolution request message from a first DNS server and generates the second domain name resolution request message according to the first domain name resolution request message, the first domain name resolution request message requests resolution of a first domain name, the second domain name resolution request message requests resolution of a second domain name, and the second domain name is a domain name corresponding to the first domain name in an assigned network;
in step S602, a second domain name resolution response message is sent to the second DNS server, where the second domain name resolution response message includes a network address corresponding to a second domain name.
According to an embodiment of the present disclosure, the domain name resolution method for the third DNS server further includes: and analyzing the second domain name to obtain the network address.
According to an embodiment of the present disclosure, wherein:
the first domain name resolution request message is received by the first DNS server from a client;
the first DNS server is a recursive DNS server of the client, the second DNS server is an authoritative DNS server of the first domain name, and the third DNS server is an authoritative DNS server of the second domain name;
the specified network is a content distribution network;
the first domain name is a public network domain name.
As shown in fig. 3, a third DNS server receives a second domain name resolution request message from a second DNS server, wherein the second DNS server receives a first domain name resolution request message from a first DNS server and generates the second domain name resolution request message according to the first domain name resolution request message, the first domain name resolution request message requests resolution of a first domain name abc.com, the second domain name resolution request message requests resolution of a second domain name abc.com.def.com, and the second domain name is a corresponding domain name of the first domain name in a specified network;
at step S602, a second domain name resolution response message is sent to the second DNS server, the second domain name resolution response message containing the network addresses 106.33.185.170 and 106.33.185.171 corresponding to the second domain name.
According to the domain name resolution method of the embodiment of the disclosure, the second DNS server directly resolves the network address of the first domain name in the designated network according to the configuration of the second domain name corresponding to the first domain name in the designated network, and hides the processes of generating and resolving the cName in the middle, thereby reducing the DNS resolution time, improving the domain name resolution availability and reducing the possibility of being interfered by a public network.
Fig. 7 shows a block diagram of a domain name resolution device for a first DNS server according to an embodiment of the present disclosure. The apparatus may be implemented as part or all of an electronic device through software, hardware, or a combination of both.
As shown in fig. 7, the domain name resolution apparatus 700 includes a first receiving module 710, a first sending module 720, a second receiving module 730, and a second sending module 740, wherein:
the first receiving module 710 is configured to receive a first domain name resolution request message sent by a client, where the first domain name resolution request message requests to resolve a first domain name;
the first sending module 720 is configured to send the first domain name resolution request message to a second DNS server;
the second receiving module 730 is configured to receive a second domain name resolution response message from the second DNS server, the second domain name resolution response message containing a network address corresponding to a second domain name, the second domain name being a corresponding domain name of the first domain name in the specified network;
the second sending module 740 is configured to send the second domain name resolution response message to the client as a response to the first domain name resolution request message.
According to an embodiment of the present disclosure, the second domain name resolution response message is received from a third DNS server after the second DNS server sends a second domain name resolution request message to the third DNS server, where the second domain name resolution request message requests resolution of a second domain name.
According to the embodiment of the present disclosure, the network address is obtained by analyzing the second domain name through the third DNS server.
According to an embodiment of the present disclosure, wherein:
the first DNS server is a recursive DNS server of the client, the second DNS server is an authoritative DNS server of the first domain name, and the third DNS server is an authoritative DNS server of the second domain name;
the specified network is a content distribution network;
the first domain name is a public network domain name.
Fig. 8 shows a block diagram of a domain name resolution device for a second DNS server according to an embodiment of the present disclosure. The apparatus may be implemented as part or all of an electronic device through software, hardware, or a combination of both.
As shown in fig. 8, the domain name resolution apparatus 800 includes a third receiving module 810 and a third sending module 820, wherein:
the third receiving module 810 is configured to receive a first domain name resolution request message sent by a first DNS server, where the first domain name resolution request message requests to resolve a first domain name;
the third sending module 820 is configured to send a second domain name resolution response message to the first DNS server as a response to the first domain name resolution request message, the second domain name resolution response message including a network address corresponding to a second domain name, the second domain name being a corresponding domain name of the first domain name in the specified network.
According to an embodiment of the present disclosure, the domain name resolution apparatus 800 further includes:
a fourth sending module 830, configured to send a second domain name resolution request message to a third DNS server, where the second domain name resolution request message requests resolution of the second domain name;
a fourth receiving module 840 configured to receive, by the second DNS server, the second domain name resolution response message from the third DNS server.
According to the embodiment of the present disclosure, the network address is obtained by analyzing the second domain name through the third DNS server.
According to an embodiment of the present disclosure, wherein:
the first domain name resolution request message is received by the first DNS server from a client;
the first DNS server is a recursive DNS server of the client, the second DNS server is an authoritative DNS server of the first domain name, and the third DNS server is an authoritative DNS server of the second domain name;
the specified network is a content distribution network;
the first domain name is a public network domain name.
Fig. 9 illustrates a block diagram of a domain name resolution device for a third DNS server according to an embodiment of the present disclosure. The apparatus may be implemented as part or all of an electronic device through software, hardware, or a combination of both.
As shown in fig. 9, the domain name resolution apparatus 900 includes a fifth receiving module 910 and a fifth sending module 920, where:
the fifth receiving module 910 is configured to receive a second domain name resolution request message from a second DNS server, where the second DNS server receives a first domain name resolution request message from a first DNS server and generates the second domain name resolution request message according to the first domain name resolution request message, the first domain name resolution request message requests to resolve a first domain name, the second domain name resolution request message requests to resolve a second domain name, and the second domain name is a corresponding domain name of the first domain name in a specified network;
the fifth sending module 920 is configured to send a second domain name resolution response message to the second DNS server, the second domain name resolution response message containing a network address corresponding to the second domain name.
According to an embodiment of the present disclosure, the apparatus 900 further comprises:
a resolution module 930 configured to perform resolution on the second domain name to obtain the network address.
According to an embodiment of the present disclosure, wherein:
the first domain name resolution request message is received by the first DNS server from a client;
the first DNS server is a recursive DNS server of the client, the second DNS server is an authoritative DNS server of the first domain name, and the third DNS server is an authoritative DNS server of the second domain name;
the specified network is a content distribution network;
the first domain name is a public network domain name.
The present disclosure also discloses an electronic device, and fig. 10 shows a block diagram of the electronic device according to an embodiment of the present disclosure.
As shown in fig. 10, the electronic device 1000 includes a memory 1001 and a processor 1002, wherein the memory 1001 is configured to store one or more computer instructions, wherein the one or more computer instructions are executed by the processor 1002 to implement a domain name resolution method according to an embodiment of the present disclosure.
According to an embodiment of the present disclosure, a domain name resolution method is used for a first DNS server, and the method includes:
receiving a first domain name resolution request message sent by a client, wherein the first domain name resolution request message requests to resolve a first domain name;
sending the first domain name resolution request message to a second DNS server;
receiving a second domain name resolution response message from the second DNS server, the second domain name resolution response message including a network address corresponding to a second domain name, the second domain name being a corresponding domain name of the first domain name in the designated network;
and sending the second domain name resolution response message to the client as a response to the first domain name resolution request message.
According to an embodiment of the present disclosure, the second domain name resolution response message is received from a third DNS server after the second DNS server sends a second domain name resolution request message to the third DNS server, where the second domain name resolution request message requests resolution of a second domain name.
According to the embodiment of the present disclosure, the network address is obtained by analyzing the second domain name through the third DNS server.
According to an embodiment of the present disclosure, wherein:
the first DNS server is a recursive DNS server of the client, the second DNS server is an authoritative DNS server of the first domain name, and the third DNS server is an authoritative DNS server of the second domain name;
the specified network is a content distribution network;
the first domain name is a public network domain name.
According to an embodiment of the present disclosure, a domain name resolution method for a second DNS server, the method includes:
receiving a first domain name resolution request message sent by a first DNS server, wherein the first domain name resolution request message requests to resolve a first domain name;
and sending a second domain name resolution response message to the first DNS server as a response to the first domain name resolution request message, wherein the second domain name resolution response message contains a network address corresponding to a second domain name, and the second domain name is a corresponding domain name of the first domain name in a specified network.
According to an embodiment of the present disclosure, the method further comprises:
sending a second domain name resolution request message to a third DNS server, wherein the second domain name resolution request message requests to resolve the second domain name;
receiving, by the second DNS server, the second domain name resolution response message from the third DNS server.
According to the embodiment of the present disclosure, the network address is obtained by analyzing the second domain name through the third DNS server.
According to an embodiment of the present disclosure, wherein:
the first domain name resolution request message is received by the first DNS server from a client;
the first DNS server is a recursive DNS server of the client, the second DNS server is an authoritative DNS server of the first domain name, and the third DNS server is an authoritative DNS server of the second domain name;
the specified network is a content distribution network;
the first domain name is a public network domain name.
According to an embodiment of the present disclosure, a domain name resolution method is used for a third DNS server, and the method includes:
receiving a second domain name resolution request message from a second DNS server, wherein the second DNS server receives a first domain name resolution request message from a first DNS server and generates the second domain name resolution request message according to the first domain name resolution request message, the first domain name resolution request message requests resolution of a first domain name, the second domain name resolution request message requests resolution of a second domain name, and the second domain name is a domain name corresponding to the first domain name in an appointed network;
sending a second domain name resolution response message to the second DNS server, the second domain name resolution response message including a network address corresponding to a second domain name.
According to an embodiment of the present disclosure, the method further comprises:
and analyzing the second domain name to obtain the network address.
According to an embodiment of the present disclosure, wherein:
the first domain name resolution request message is received by the first DNS server from a client;
the first DNS server is a recursive DNS server of the client, the second DNS server is an authoritative DNS server of the first domain name, and the third DNS server is an authoritative DNS server of the second domain name;
the specified network is a content distribution network;
the first domain name is a public network domain name.
FIG. 11 shows a schematic block diagram of a computer system suitable for use in implementing a method according to an embodiment of the present disclosure.
As shown in fig. 11, the computer system 1100 includes a processing unit 1101, which can execute various processes in the above-described embodiments according to a program stored in a Read Only Memory (ROM)1102 or a program loaded from a storage section 1108 into a Random Access Memory (RAM) 1103. In the RAM 1103, various programs and data necessary for the operation of the system 1100 are also stored. The processing unit 1101, the ROM 1102, and the RAM 1103 are connected to each other by a bus 1104. An input/output (I/O) interface 1105 is also connected to bus 1104.
The following components are connected to the I/O interface 1105: an input portion 1106 including a keyboard, mouse, and the like; an output portion 1107 including a signal output unit such as a Cathode Ray Tube (CRT), a Liquid Crystal Display (LCD), and a speaker; a storage section 1108 including a hard disk and the like; and a communication section 1109 including a network interface card such as a LAN card, a modem, or the like. The communication section 1109 performs communication processing via a network such as the internet. A driver 1110 is also connected to the I/O interface 1105 as necessary. A removable medium 1111 such as a magnetic disk, an optical disk, a magneto-optical disk, a semiconductor memory, or the like is mounted on the drive 1110 as necessary, so that a computer program read out therefrom is mounted into the storage section 1108 as necessary. The processing unit 1101 may be implemented as a CPU, a GPU, a TPU, an FPGA, an NPU, or other processing units.
In particular, the above described methods may be implemented as computer software programs according to embodiments of the present disclosure. For example, embodiments of the present disclosure include a computer program product comprising a computer program tangibly embodied on a computer-readable storage medium, the computer program containing program code for performing the above-described method. In such an embodiment, the computer program may be downloaded and installed from a network through the communication portion 1109 and/or installed from the removable medium 1111.
Fig. 12 shows a schematic diagram of a domain name resolution system according to an embodiment of the present disclosure.
As shown in fig. 12, a domain name resolution system 1200 includes:
a first DNS server 1210, the first DNS server 1210 comprising a first memory 1211 and a first processor 1212, the first memory for storing one or more computer instructions, wherein the one or more computer instructions are executed by the first processor to implement the method steps performed by the first DNS server;
a second DNS server 1220, the second DNS server 1220 comprising a second memory 1221 and a second processor 1222, the second memory for storing one or more computer instructions, wherein the one or more computer instructions are executed by the second processor to implement the method steps performed by the second DNS server;
a third DNS server 1230, said third DNS server 1230 comprising a third memory 1231 for storing one or more computer instructions, wherein said one or more computer instructions are executed by said third processor for carrying out the method steps performed by the third DNS server described above, and a third processor 1232.
The flowchart and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of systems, methods and computer program products according to various embodiments of the present disclosure. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). It should also be noted that, in some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. It will also be noted that each block of the block diagrams and/or flowchart illustration, and combinations of blocks in the block diagrams and/or flowchart illustration, can be implemented by special purpose hardware-based systems which perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.
The units or modules described in the embodiments of the present disclosure may be implemented by software or by programmable hardware. The units or modules described may also be provided in a processor, and the names of the units or modules do not in some cases constitute a limitation of the units or modules themselves.
As another aspect, the present disclosure also provides a computer-readable storage medium, which may be a computer-readable storage medium included in the electronic device or the computer system in the above embodiments; or it may be a separate computer readable storage medium not incorporated into the device. The computer readable storage medium stores one or more programs for use by one or more processors in performing the methods described in the present disclosure.
The foregoing description is only exemplary of the preferred embodiments of the disclosure and is illustrative of the principles of the technology employed. It will be appreciated by those skilled in the art that the scope of the invention in the present disclosure is not limited to the specific combination of the above-mentioned features, but also encompasses other embodiments in which any combination of the above-mentioned features or their equivalents is possible without departing from the inventive concept. For example, the above features and (but not limited to) the features disclosed in this disclosure having similar functions are replaced with each other to form the technical solution.
Claims (22)
1. A domain name resolution method of a content distribution network includes:
receiving a first domain name resolution request message sent by a client through a first Domain Name System (DNS) server, wherein the first domain name resolution request message requests to resolve a first domain name;
sending, by the first DNS server, the first domain name resolution request message to a second DNS server;
acquiring a second domain name resolution response message through the second DNS, wherein the second domain name resolution response message contains a network address corresponding to a second domain name, and the second domain name is a corresponding domain name of the first domain name in a content distribution network;
sending, by the second DNS server, the second domain name resolution response message to the first DNS server;
and sending the second domain name resolution response message to the client through the first DNS server as a response to the first domain name resolution request message.
2. A domain name resolution method comprises the following steps:
receiving a first domain name resolution request message sent by a client through a first Domain Name System (DNS) server, wherein the first domain name resolution request message requests to resolve a first domain name;
sending, by the first DNS server, the first domain name resolution request message to a second DNS server;
acquiring a second domain name resolution response message through the second DNS, wherein the second domain name resolution response message contains a network address corresponding to a second domain name, and the second domain name is a corresponding domain name of the first domain name in a designated network;
sending, by the second DNS server, the second domain name resolution response message to the first DNS server;
and sending the second domain name resolution response message to the client through the first DNS server as a response to the first domain name resolution request message.
3. The method of claim 2, wherein the obtaining, by the second DNS server, a second domain name resolution response message comprises:
sending a second domain name resolution request message to a third DNS server through the second DNS server, wherein the second domain name resolution request message requests to resolve the second domain name;
receiving, by the second DNS server, the second domain name resolution response message from the third DNS server.
4. The method of claim 3, further comprising:
and analyzing the second domain name through the third DNS server to obtain the network address.
5. The method of claim 2, wherein:
the first DNS server is a recursive DNS server of the client, the second DNS server is an authoritative DNS server of the first domain name, and the third DNS server is an authoritative DNS server of the second domain name;
the specified network is a content distribution network;
the first domain name is a public network domain name.
6. A domain name resolution method for a first DNS server, the method comprising:
receiving a first domain name resolution request message sent by a client, wherein the first domain name resolution request message requests to resolve a first domain name;
sending the first domain name resolution request message to a second DNS server;
receiving a second domain name resolution response message from the second DNS server, the second domain name resolution response message including a network address corresponding to a second domain name, the second domain name being a corresponding domain name of the first domain name in the designated network;
and sending the second domain name resolution response message to the client as a response to the first domain name resolution request message.
7. The method of claim 6, wherein the second domain name resolution response message is received from a third DNS server after the second DNS server sends a second domain name resolution request message to the third DNS server, wherein the second domain name resolution request message requests resolution of a second domain name.
8. The method of claim 7, wherein the network address is resolved to the second domain name by the third DNS server.
9. The method of claim 7, wherein:
the first DNS server is a recursive DNS server of the client, the second DNS server is an authoritative DNS server of the first domain name, and the third DNS server is an authoritative DNS server of the second domain name;
the specified network is a content distribution network;
the first domain name is a public network domain name.
10. A domain name resolution method for a second DNS server, the method comprising:
receiving a first domain name resolution request message sent by a first DNS server, wherein the first domain name resolution request message requests to resolve a first domain name;
and sending a second domain name resolution response message to the first DNS server as a response to the first domain name resolution request message, wherein the second domain name resolution response message contains a network address corresponding to a second domain name, and the second domain name is a corresponding domain name of the first domain name in a specified network.
11. The method of claim 10, further comprising:
sending a second domain name resolution request message to a third DNS server, wherein the second domain name resolution request message requests to resolve the second domain name;
receiving, by the second DNS server, the second domain name resolution response message from the third DNS server.
12. The method of claim 11, wherein the network address is resolved to the second domain name by the third DNS server.
13. The method of claim 11, wherein:
the first domain name resolution request message is received by the first DNS server from a client;
the first DNS server is a recursive DNS server of the client, the second DNS server is an authoritative DNS server of the first domain name, and the third DNS server is an authoritative DNS server of the second domain name;
the specified network is a content distribution network;
the first domain name is a public network domain name.
14. A domain name resolution method for a third DNS server, the method comprising:
receiving a second domain name resolution request message from a second DNS server, wherein the second DNS server receives a first domain name resolution request message from a first DNS server and generates the second domain name resolution request message according to the first domain name resolution request message, the first domain name resolution request message requests resolution of a first domain name, the second domain name resolution request message requests resolution of a second domain name, and the second domain name is a domain name corresponding to the first domain name in an appointed network;
sending a second domain name resolution response message to the second DNS server, the second domain name resolution response message including a network address corresponding to a second domain name.
15. The method of claim 14, further comprising:
and analyzing the second domain name to obtain the network address.
16. The method of claim 14, wherein:
the first domain name resolution request message is received by the first DNS server from a client;
the first DNS server is a recursive DNS server of the client, the second DNS server is an authoritative DNS server of the first domain name, and the third DNS server is an authoritative DNS server of the second domain name;
the specified network is a content distribution network;
the first domain name is a public network domain name.
17. A domain name resolution apparatus for a first DNS server, the apparatus comprising:
the first receiving module is configured to receive a first domain name resolution request message sent by a client, wherein the first domain name resolution request message requests to resolve a first domain name;
a first sending module configured to send the first domain name resolution request message to a second DNS server;
a second receiving module configured to receive a second domain name resolution response message from the second DNS server, the second domain name resolution response message including a network address corresponding to a second domain name, the second domain name being a corresponding domain name of the first domain name in the specified network;
a second sending module configured to send the second domain name resolution response message to the client as a response to the first domain name resolution request message.
18. A domain name resolution apparatus for a second DNS server, the apparatus comprising:
a third receiving module, configured to receive a first domain name resolution request message sent by a first DNS server, where the first domain name resolution request message requests to resolve a first domain name;
a third sending module configured to send a second domain name resolution response message to the first DNS server as a response to the first domain name resolution request message, the second domain name resolution response message including a network address corresponding to a second domain name, the second domain name being a domain name corresponding to the first domain name in a specified network.
19. A domain name resolution apparatus for a third DNS server, the apparatus comprising:
a fifth receiving module, configured to receive a second domain name resolution request message from a second DNS server, where the second DNS server receives a first domain name resolution request message from a first DNS server and generates the second domain name resolution request message according to the first domain name resolution request message, the first domain name resolution request message requests resolution of a first domain name, the second domain name resolution request message requests resolution of a second domain name, and the second domain name is a domain name corresponding to the first domain name in a specified network;
a fifth sending module configured to send a second domain name resolution response message to the second DNS server, the second domain name resolution response message including a network address corresponding to a second domain name.
20. An electronic device comprising a memory and a processor; wherein the memory is configured to store one or more computer instructions, wherein the one or more computer instructions are executed by the processor to implement the method steps of any of claims 6-16.
21. A readable storage medium having stored thereon computer instructions which, when executed by a processor, carry out the method steps of any of claims 6 to 16.
22. A domain name resolution system, comprising:
a first DNS server comprising a first memory for storing one or more computer instructions and a first processor, wherein the one or more computer instructions are executed by the first processor to implement the method steps of any of claims 6 to 9;
a second DNS server comprising a second memory for storing one or more computer instructions, and a second processor, wherein the one or more computer instructions are executed by the second processor to implement the method steps of any of claims 10 to 13;
a third DNS server comprising a third memory for storing one or more computer instructions and a third processor, wherein the one or more computer instructions are executed by the third processor to implement the method steps of any of claims 14 to 16.
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