WO2017161965A1 - Procédé, dispositif et système de redirection d'un système de noms de domaine (dns) dynamique - Google Patents

Procédé, dispositif et système de redirection d'un système de noms de domaine (dns) dynamique Download PDF

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Publication number
WO2017161965A1
WO2017161965A1 PCT/CN2017/072835 CN2017072835W WO2017161965A1 WO 2017161965 A1 WO2017161965 A1 WO 2017161965A1 CN 2017072835 W CN2017072835 W CN 2017072835W WO 2017161965 A1 WO2017161965 A1 WO 2017161965A1
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Prior art keywords
address information
dns
domain name
redirection
client
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Ceased
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PCT/CN2017/072835
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English (en)
Chinese (zh)
Inventor
王玲
陈辉
武云飞
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ZTE Corp
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ZTE Corp
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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]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
    • H04L65/40—Support for services or applications
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
    • H04L41/06—Management of faults, events, alarms or notifications
    • H04L41/0654—Management of faults, events, alarms or notifications using network fault recovery
    • H04L41/0668—Management of faults, events, alarms or notifications using network fault recovery by dynamic selection of recovery network elements, e.g. replacement by the most appropriate element after failure

Definitions

  • the present invention relates to the field of communications and computers, and in particular, to a dynamic domain name system DNS redirection method, apparatus and system.
  • DNS Domain Name System
  • IP Internet Protocol
  • GSLB Global Server Load Balance
  • the present invention provides a method, a device and a system for DNS redirection of a dynamic domain name system, so as to at least solve the problem that when a DNS server fails in a related art, the redirection needs to reconfigure the DNS database, and the service cannot be quickly restored.
  • a dynamic domain name system DNS redirection method including: forwarding a domain name resolution request message received from a client to a dynamic domain name system DNS server; receiving the DNS server according to the domain name resolution request a response message returned by the message, wherein the response message carries the DNS for the client to allocate address information for accessing the network; and according to the address information, the pre-configured address information and the redirected address information Obtaining redirected address information in the corresponding relationship; and sending the redirected address information to the client.
  • the correspondence table between the original IP address information and the redirected IP address information is stored on the gateway.
  • the method before forwarding the domain name resolution request message received from the client to the dynamic domain name system DNS server, the method further includes: receiving a DNS redirection configuration command sent by the service management platform; and configuring the command according to the DNS redirection Configure the mapping between address information and redirected address information.
  • the mapping between the address information and the redirected address information according to the DNS redirection configuration command includes: if the configuration file is not carried in the DNS redirection configuration command, according to the DNS redirection configuration command. Requesting and obtaining a configuration file from the service management platform, and establishing a correspondence between the address information and the redirected address information according to the configuration file; or, if the configuration file is carried in the DNS redirection configuration command, The configuration file configures a correspondence between the address information and the redirected address information.
  • forwarding the domain name resolution request message received from the client to the dynamic domain name system DNS server includes: recording an IP address and a port number in the domain name resolution request message; and using an Ethernet header in the domain name resolution request message The source MAC address and the source IP address information in the IP header are replaced with the MAC address and the IP address of the outbound interface; and the modified domain name resolution request message is forwarded to the DNS server.
  • the redirected address information carries an IP address and a port number of the client.
  • a dynamic domain name system DNS redirection device which is applied to a gateway, and includes: a forwarding module, configured to forward a domain name resolution request message received from a client to a dynamic domain name system DNS server; a receiving module, configured to receive a response message that is returned by the DNS server according to the domain name resolution request message, where the response message carries the DNS to allocate address information for accessing the network to the client; And being configured to obtain, according to the address information, the redirected address information from the correspondence between the pre-configured address information and the redirected address information; and the sending module is configured to send the redirected address information to the client.
  • the device further includes: a second receiving module, configured to receive a DNS redirection configuration command sent by the service management platform; and a configuration module, configured to configure address information and redirect address information according to the DNS redirection configuration command Correspondence.
  • a second receiving module configured to receive a DNS redirection configuration command sent by the service management platform
  • a configuration module configured to configure address information and redirect address information according to the DNS redirection configuration command Correspondence.
  • the configuration module includes: a first configuration unit, configured to request, according to the DNS redirection configuration command, to the service management platform, if the configuration file is not carried in the DNS redirection configuration command Obtaining a configuration file, and establishing a correspondence between the address information and the redirected address information according to the configuration file; or, the second configuration unit is configured to: when the configuration file is carried in the DNS redirection configuration command, The correspondence between the configuration file configuration address information and the redirected address information.
  • the forwarding module includes: a recording unit, configured to record an IP address and a port number in the domain name resolution request message; and a replacement unit configured to source the Ethernet header in the domain name resolution request message The source IP address information in the MAC address and the IP header is replaced with the MAC address and the IP address of the device; and the forwarding unit is configured to forward the modified domain name resolution request message to the DNS server.
  • a dynamic domain name system DNS redirection system including a gateway and a DNS server, wherein: the DNS server is configured to receive a domain name resolution request message received by the gateway and forwarded from the client, according to the a response message returned by the domain name resolution request message, wherein the response message carries the DNS for the client to allocate address information for accessing the network; and the gateway is configured to receive the response message according to the address The information obtains the redirected address information from the correspondence between the pre-configured address information and the redirected address information, and sends the redirected address information to the client.
  • system further includes: a service management platform, configured to send a DNS redirection configuration command to the gateway, where the DNS redirection configuration command is used to configure a correspondence between the gateway configuration address information and the redirected address information.
  • a service management platform configured to send a DNS redirection configuration command to the gateway, where the DNS redirection configuration command is used to configure a correspondence between the gateway configuration address information and the redirected address information.
  • Another embodiment of the present invention provides a computer storage medium, where the computer storage medium stores execution instructions for performing one or a combination of the steps in the foregoing method embodiments.
  • the DNS server database can be avoided during the DNS redirection process, and the address replacement part in the traditional redirection process is placed on the gateway, which solves the problem that when the DNS server fails, the redirection needs to reconfigure the DNS database.
  • Technical issues also reduce the load on the server; significantly improve network recovery speed and improve user satisfaction.
  • FIG. 1 is a flowchart of a method for redirecting a DNS of a dynamic domain name system according to an embodiment of the present invention
  • FIG. 2 is a structural block diagram of a dynamic domain name system DNS redirection device according to an embodiment of the present invention
  • FIG. 3 is a block diagram 1 of a preferred structure of a dynamic domain name system DNS redirection device according to an embodiment of the present invention
  • FIG. 4 is a structural block diagram of a configuration module in a DNS redirection device of a dynamic domain name system according to an embodiment of the present invention
  • FIG. 5 is a structural block diagram of a forwarding module in a DNS redirection device of a dynamic domain name system according to an embodiment of the present invention
  • FIG. 6 is a flowchart of a preferred DNS redirection system of a dynamic domain name system according to an embodiment of the present invention
  • FIG. 7 is a flowchart of a preferred configuration command of a dynamic domain name system DNS redirection system according to an embodiment of the present invention.
  • FIG. 8 is a flowchart of a configuration command of a dynamic domain name system DNS redirection system according to an embodiment of the present invention
  • FIG. 9 is a flowchart of redirecting a dynamic domain name system DNS redirection system according to an embodiment of the present invention.
  • the embodiment of the present invention provides a dynamic domain name system DNS redirection method, which is provided with a home gateway implementing the redirection method, and a system of a dynamic domain name system DNS redirection method, and FIG. 1 is drawn according to an embodiment of the present invention.
  • Step S102 Forwarding the domain name resolution request message received from the client to the dynamic domain name system DNS server;
  • Step S104 Receive a response message that is returned by the DNS server according to the domain name resolution request message, where the response message carries the DNS to allocate address information for accessing the network to the client.
  • Step S106 Obtain redirection address information from the correspondence between the pre-configured address information and the redirected address information according to the address information; and send the redirected address information to the client.
  • the home gateway forwards the domain name resolution request message to the DNS server, and the DNS server does not perform any processing on the message, directly returns the DNS response information carrying the incorrect address information, and the home gateway uses the wrong address information in the response information.
  • the replacement is replaced with the correct address information, and then the home gateway forwards the response information that is claimed to be replaced to the client, and the client uses the address information in the replaced response information to access the Internet, thereby providing a quick reply manner of the DNS service, which is significantly improved.
  • User experience reduces the difficulty of DNS server management.
  • the DNS redirection device receives the DNS redirection configuration command sent by the service management platform before forwarding the domain name resolution request message received from the client to the dynamic domain name system DNS server; and the home gateway is configured according to the DNS redirection configuration command. Corresponding relationship between the address information and the redirected address information is configured for the home gateway to search in step S106.
  • the DNS redirection device configures the correspondence between the address information and the redirected address information according to the DNS redirection configuration command in two ways.
  • the DNS redirection configuration command does not carry the configuration file, and the DNS redirection is performed. After receiving the configuration command, the device requests and obtains a configuration file from the service management platform, and establishes a correspondence between the address information and the redirected address information according to the configuration file.
  • the DNS redirection configuration is performed.
  • the configuration file carries the configuration file.
  • the DNS redirection device then configures the correspondence between the address information and the redirected address information according to the configuration file.
  • the DNS redirection device records the IP address and port number in the client domain name resolution request message before forwarding the domain name resolution request message received by the client to the dynamic domain name system DNS server before performing the step S102;
  • the source MAC address in the Ethernet header and the source IP address information in the IP header in the domain name resolution request message are replaced with the MAC address and the IP address of the outbound interface; and the modified domain name resolution request message is forwarded to the DNS server.
  • the DNS redirector masquerades itself as a client to send DNS request information to the DNS server.
  • the DNS redirection device performs step S106, that is, when sending the message of redirecting the address information to the client, adding the previously recorded IP address and port number of the client to the message, through this step, the DNS redirection device will I pretend to be a DNS server, so that the client receives the redirect message without any awareness.
  • the correspondence between the original DNS address information and the redirected address information carried in the configuration file or configuration command managed by the service management platform should be unique, that is, an original address information Only one redirected address information can be used, which is guaranteed by the service management platform and can be verified by the gateway device. If the discovery is not unique, the service management platform will be notified that the configuration fails.
  • FIG. 2 is a structural block diagram of a dynamic domain name system DNS redirection device according to an embodiment of the present invention. As shown in FIG. 2, the device includes The following sections:
  • the forwarding module 22 is configured to forward the domain name resolution request message received from the client to the dynamic domain name system DNS server;
  • the first receiving module 24 is configured to receive a response message that is returned by the DNS server according to the domain name resolution request message, where the response message carries the DNS address information for the client to access the network. ;
  • the obtaining module 26 is configured to reconfigure the address information from the pre-configured address information according to the address information Obtaining redirected address information in a correspondence relationship of address information;
  • the sending module 28 is configured to send the redirected address information to the client.
  • FIG. 3 is a block diagram of a preferred structure of a dynamic domain name system DNS redirection device according to an embodiment of the present invention. As shown in FIG. 3, the device may further include:
  • the second receiving module 32 is configured to receive a DNS redirection configuration command sent by the service management platform.
  • the configuration module 34 is configured to configure a correspondence between the address information and the redirected address information according to the DNS redirection configuration command.
  • the device can utilize the module to accept the configuration of the service management platform.
  • the configuration module 34 includes:
  • the configuration unit 42 is configured to: when the configuration file is not carried in the DNS redirection configuration command, request and acquire a configuration file from the service management platform according to the DNS redirection configuration command, and establish a configuration file according to the configuration file. Corresponding relationship between the address information and the redirected address information; or, if the configuration file is carried in the DNS redirection configuration command, the correspondence between the address information and the redirected address information is configured according to the configuration file.
  • FIG. 5 is a structural block diagram of a forwarding module in a dynamic domain name system DNS redirection device according to an embodiment of the present invention. As shown in FIG. 5, the forwarding module 22 in the device includes:
  • the recording unit 52 is configured to record an IP address and a port number in the domain name resolution request message
  • the replacing unit 54 is configured to replace the source MAC address in the Ethernet header and the source IP address information in the IP header in the domain name resolution request message with the MAC address and the IP address of the device;
  • the forwarding unit 56 is configured to forward the modified domain name resolution request message to the DNS server.
  • the forwarding module disguise itself as a client when forwarding the request, so that The DNS server does not send a DNS response request.
  • the embodiment of the present invention further provides a dynamic domain name system DNS redirection system, which includes a gateway and a DNS server, wherein: the DNS server is configured to receive a domain name resolution request message received from the client and forwarded by the gateway, according to the domain name resolution. a response message returned by the request message, wherein the response message returned from the DNS server carries the DNS to allocate address information for accessing the network to the client; and the gateway is configured to receive the response message according to the address The information obtains the redirected address information from the correspondence between the pre-configured address information and the redirected address information, and sends the redirected address information to the client.
  • a dynamic domain name system DNS redirection system which includes a gateway and a DNS server, wherein: the DNS server is configured to receive a domain name resolution request message received from the client and forwarded by the gateway, according to the domain name resolution.
  • a response message returned by the request message wherein the response message returned from the DNS server carries the DNS to allocate address information for accessing the network to the
  • FIG. 6 is a flowchart of a preferred method for DNS redirection of a dynamic domain name system according to an embodiment of the present invention. As shown in FIG. 6, the method includes the following steps:
  • Step S602 the terminal sends a DNS request message to the gateway.
  • Step S604 the gateway forwards the client DNS request message to the DNS server.
  • Step S606 the DNS server sends a DNS response message to the gateway.
  • Step S608 the gateway parses the address message in the response message, and replaces the address in the DNS server with the redirect address according to the corresponding table in the database;
  • Step S610 the gateway sends the replaced DNS response message to the client.
  • the system further includes: a service management platform, configured to send a DNS redirection configuration command to the gateway, where the DNS redirection configuration command is used for mapping the correspondence between the address information and the redirected address information.
  • a service management platform configured to send a DNS redirection configuration command to the gateway, where the DNS redirection configuration command is used for mapping the correspondence between the address information and the redirected address information.
  • FIG. 7 is a flowchart of a preferred configuration command of a dynamic domain name system DNS redirection system according to an embodiment of the present invention. As shown in Figure 7, it includes:
  • Step S702 The service platform sends a configuration command to the gateway.
  • Step S704 the gateway configures a correspondence between the original address and the new address according to the configuration command.
  • FIG. 8 is a flow chart of obtaining a configuration command of a dynamic domain name system DNS redirection system
  • Step S802 The service management platform first sends a configuration command to the gateway, where the command information includes a URL of the server where the configuration file is located;
  • Step S804 The gateway initiates an http or ftp request, and obtains a configuration file by itself at the specified location.
  • Step S806 The gateway establishes a correspondence table between the original IP address and the redirected IP address according to the configuration file information, and stores the correspondence table on the gateway.
  • FIG. 9 is a flowchart of a redirection process of a dynamic domain name system DNS redirection system according to an embodiment of the present invention.
  • a dynamic domain name system redirection system is taken as an example to further illustrate an embodiment of the present invention. As shown in Figure 9:
  • Step S902 The service platform sends a redirection configuration command to the home gateway, where the command carries the address information of the configuration file.
  • Step S904 After the gateway parses the command, send an http or ftp request to the resource site where the configuration file is located;
  • the gateway parses the configuration file and internally establishes a correspondence table between the original IP address and the redirected IP address.
  • Step S908 The gateway checks whether the correspondence in the file is unique, that is, an original IP address corresponds to only one redirected IP address. If the uniqueness is met, the gateway will establish a correspondence between the original IP address and the redirected IP address. If the uniqueness is not met, the configuration file is discarded to notify the service platform that the redirection setting fails. ;
  • Step S910 The gateway listens to the DNS request of the user side, and when intercepting the DNS request sent by the user equipment, records the IP address and port number of the user side request packet as the unique identifier of the user side client program; the gateway will report The source MAC address in the Ethernet header and the source IP address information in the IP header are replaced with the MAC address and IP address of the outbound interface of the gateway. Forward the modified message to the DNS server;
  • Step S912 The DNS server returns a DNS response message.
  • Step S914 The gateway receives the response of the DNS server. Parse the addr field of the DNS response message and extract the IP address. If the IP address is in the original IP address of the relational table, or the IP address is empty, the information is replaced and the message is reassembled. The gateway forwards the reassembled packet to the user-side process according to the recorded user-side client program identifier. ;
  • the gateway analyzes the DNS response message and extracts the parsed IP address. If the response code (Response code) in the DNS response message is a Name Error, or the number of answer records (ANCOUNT) is 0, the original IP in the redirected configuration data is marked with "" (empty address) as a key. Look in the address list. If the IP address exists in the original address information in the mapping table, the addr information in the response packet is modified to be the corresponding redirected IP address. If the address is not available, the DNS packet part of the original packet is not modified.
  • Embodiments of the present invention also provide a storage medium.
  • the foregoing storage medium stores an execution instruction, where the execution instruction is used to perform one or a combination of the steps in the foregoing method embodiments.
  • the foregoing storage medium may include, but is not limited to, a USB flash drive, a Read-Only Memory (ROM), and a Random Access Memory (RAM).
  • ROM Read-Only Memory
  • RAM Random Access Memory
  • modules or steps of the present invention described above can be implemented by a general-purpose computing device that can be centralized on a single computing device or distributed across a network of multiple computing devices. Alternatively, they may be implemented by program code executable by the computing device such that they may be stored in the storage device by the computing device and, in some cases, may be different from the order herein.
  • the steps shown or described are performed, or they are separately fabricated into individual integrated circuit modules, or a plurality of modules or steps thereof are fabricated as a single integrated circuit module.
  • the invention is not limited to any specific combination of hardware and software.
  • the DNS redirection method, apparatus, and system for the domain name system provided by the embodiments of the present invention have the following beneficial effects: the DNS server database can be avoided during the DNS redirection process, and the DNS server fails when the DNS server fails. Redirection requires technical problems to reconfigure the DNS database, which also reduces the load on the server; improves network recovery speed and user satisfaction.

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Abstract

La présente invention concerne un procédé, un dispositif et un système de redirection d'un système de noms de domaine (DNS) dynamique, le procédé comportant les étapes consistant à: transmettre un message de demande de résolution de nom de domaine reçu en provenance d'un client à un serveur de système de noms de domaine (DNS) dynamique; recevoir un message de réponse qui est renvoyé par le serveur de DNS en fonction du message de demande de résolution de nom de domaine, le message de réponse transportant les informations d'adresse attribuées par le DNS au client pour accéder à un réseau; acquérir, d'après les informations d'adresse, des informations d'adresse de redirection à partir d'une corrélation préconfigurée entre informations d'adresse et informations d'adresse de redirection; envoyer les informations d'adresse de redirection au client. La présente invention peut éviter le fonctionnement du serveur de base de données de DNS pendant la redirection de DNS, ce qui résout le problème technique posé par le fait que, lorsque le serveur de DNS est défaillant, la redirection exige la reconfiguration de la base de données de DNS, allégeant la charge du serveur, améliorant la vitesse de rétablissement du réseau et le degré de satisfaction de l'utilisateur.
PCT/CN2017/072835 2016-03-23 2017-02-03 Procédé, dispositif et système de redirection d'un système de noms de domaine (dns) dynamique Ceased WO2017161965A1 (fr)

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CN201610169536.5A CN107231445A (zh) 2016-03-23 2016-03-23 一种动态域名系统dns重定向方法、装置及系统
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CN114257390B (zh) * 2020-09-22 2023-05-09 华为技术有限公司 认证方法、网络设备、认证服务器、用户设备及存储介质
CN117278524A (zh) * 2023-09-26 2023-12-22 北京网藤科技有限公司 解决浏览器打开本地服务器显示警告提示的方法及系统

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