WO2011107011A1

WO2011107011A1 - Method and customer premise equipment for ipv6-network-based dns redirection

Info

Publication number: WO2011107011A1
Application number: PCT/CN2011/071171
Authority: WO
Inventors: 才彦峰; 梁烨; 何智勤
Original assignee: 华为终端有限公司
Priority date: 2010-03-03
Filing date: 2011-02-22
Publication date: 2011-09-09
Also published as: CN102196052A

Abstract

The embodiments of the invention provide a method and a customer premise equipment for Internet-Protocol-Version-6(IPv6)-network-based Domain Name System (DNS) redirection. The method includes: receiving a DNS request message from a user terminal (101); if determining that the destination site address of the DNS request message is a site-local address, then obtaining the global DNS address corresponding to the site-local address (102); transmitting the DNS request message to the global DNS address (103). The invention also provides a customer premise equipment thereby improving the efficiency of the DNS redirection technology implementation and address management.

Description

TECHNICAL FIELD The present invention relates to network technologies, and in particular, to a DNS redirection method and a client device based on an IPv6 network.

Background technique

The current IPv6 (Internet Protocol Version 6, Internet Protocol Version 6) network evolution is still immature. In the early days, due to the lack of a DNS address delivery mechanism similar to IPv4 (Internet Protocol Version 4, Internet Protocol Version 4), Microsoft was drafting. Three well-known Site-Local Unicast Addresses are defined in the draft-ietf-ipv6-dns-discovery-06 (Well known site local unicast addresses for DNS resolver) as the DNS (Domain Name System, i or name system) ) address ( fecO:000:0000:ffff: : l , fec0:000:0000:ffff: :2 , fec0:000:0000:ffff: :3 ) , if the user terminal host does not get DNS, you can These three addresses are used by default.

Although RFC (Request For Comments) 3879 has explicitly proposed to use site-local addresses, the current problem to be solved is how to enable DNS redirection for user terminal hosts that have used this approach. In the prior art, through the network deployment, a DNS resolution server is set in each site network, and the address is the above three well-known site local addresses.

In the process of implementing the present invention, the inventors have found that at least the following problems exist in the prior art: Since the site local address range is unclear, the application developer and the address manager are difficult to cope with, resulting in the prior art DNS redirection. Technical implementation and address management are inefficient. Summary of the invention

Embodiments of the present invention provide a DNS redirection method and a client end based on an IPv6 network. Devices to improve the efficiency of DNS redirection technology implementation and address management.

In an aspect, the embodiment of the present invention provides a DNS redirection method for a domain name system based on an IPv6 network, where the method includes: receiving a DNS request message from a user terminal; and determining a destination site address of the DNS request message as a site local The address is the global DNS address corresponding to the local address of the site; the DNS request is sent to the global DNS address.

On the other hand, the embodiment of the present invention provides a user equipment of a DNS redirection based on an IPv6 network, where the user equipment includes: a first receiving unit, configured to receive a DNS request message from the user terminal; a unit, configured to determine whether the destination site address of the DNS request message is a site-local address; the first obtaining unit, configured to: when the first determining unit determines that the destination site address of the DNS request message is a site-local address, obtain a site-local address corresponding to The global sending address is used by the first sending unit, and is configured to send a DNS request message to the global DNS address.

The embodiment of the present invention receives the DNS request message from the user terminal. If the destination site address of the message is the site-local address, the global DNS address corresponding to the site local address is obtained, and the DNS request packet is sent to the global DNS address. The user terminal host that has used the site-local address can successfully implement DNS redirection, thereby improving the efficiency of DNS redirection technology implementation and address management. DRAWINGS

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the description of the prior art will be briefly described below. Obviously, the drawings in the following description are only It is a certain embodiment of the present invention, and other drawings can be obtained from those skilled in the art without any inventive labor.

1A is a flowchart of a DNS redirection method of a domain name system based on an IPv6 network according to an embodiment of the present invention;

FIG. 1B is a flowchart of another DNS redirection method of a domain name system based on an IPv6 network according to an embodiment of the present invention; FIG. 2 is a schematic structural diagram of a user equipment of a DNS redirection based on an IPv6 network according to an embodiment of the present invention;

FIG. 3 is a schematic diagram of a DNS redirection user equipment applied to an IPv6 network according to an embodiment of the present invention. detailed description

The electronic product with the smart card according to the embodiment of the present invention will be described in detail below with reference to the accompanying drawings.

It should be understood that the described embodiments are only a part of the embodiments of the invention, and not all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

Embodiment 1:

As shown in FIG. 1A, a flowchart of a DNS redirection method for a domain name system based on an IPv6 network according to an embodiment of the present invention includes:

101. Receive a DNS request packet from a user terminal.

102. If it is determined that the destination site address of the DNS request is a site-local address, obtain a global DNS address corresponding to the site local address.

If it is determined that the destination site address of the DNS request message is not a site-local address, then the DNS request is directly transferred.

103. Send a DNS request to the global DNS address.

Optionally, after obtaining the global DNS address corresponding to the local address of the site, the site local address of the DNS request may be changed to a global DNS address, and then the DNS request is sent to the global DNS address, which may also be understood as , to redirect the DNS request 4 艮 text.

Optionally, the method may further include: if determining that the destination site address of the DNS request packet is not a site-local address, directly forwarding the DNS request packet.

The technical solution of the foregoing method embodiment of the present invention adopts receiving a DNS request from a user terminal, and if it determines that the destination site address of the DNS request message is a site-local address, The global DNS address corresponding to the local address of the site is obtained. The technical means for sending the DNS request packet to the global DNS address can also be understood as: when the destination address is the site-local address, the global DNS address is redirected to the site-local address. That is, the DNS request message is redirected, so that the operation of the DNS resolution server is set in each site network without performing network deployment, and the user terminal host that has used the site local address can be successfully implemented. DNS redirection, which improves the efficiency of DNS redirection technology implementation and address management.

Optionally, as shown in FIG. 1B, which is a flowchart of another method for DNS redirection of a domain name system based on an IPv6 network according to an embodiment of the present invention, where the method may include not only the foregoing steps 101, 102, and 103, but the method may further include :

104. Receive a DNS response message from a server corresponding to the global DNS address.

105, determining whether the DNS response message is a redirect response message: If the DNS response message is determined to be a redirect response message, go to step 106; if it is determined that the DNS response message is not a redirect response message, go to step 107;

106. Obtain an address of the user terminal corresponding to the DNS response file, and send a DNS response to the address of the user terminal.

107, direct forwarding DNS response 4 艮 text.

The technical solution of the foregoing method embodiment of the present invention is to receive a DNS request from the user terminal, and to obtain a global DNS address corresponding to the local address of the site if the destination site address of the DNS request message is a site-local address; The technical means for sending a DNS request message by an address may also be understood as: when the destination station address is a site-local address, the global DNS address is redirected to the site-local address, that is, the DNS request is redirected. Therefore, the DNS response packet from the server corresponding to the global DNS address is further received and distributed, so that the user terminal host that has used the site local address can access the network normally, even if the user terminal that sends the DNS request can successfully request the DNS.

Embodiment 2: Corresponding to the foregoing method embodiment, as shown in FIG. 2, is a schematic structural diagram of a user equipment of a DNS redirection based on an IPv6 network according to an embodiment of the present invention, where the user equipment includes: a first receiving unit 201, configured to receive a DNS request message from the user terminal; the first determining unit 202 is configured to determine whether the destination site address of the DNS request message is a site local address;

The first obtaining unit 203 is configured to: when the first determining unit 202 determines that the destination site address of the DNS request packet is a site local address, obtain a global DNS address corresponding to the site local address;

The first sending unit 204 is configured to send a DNS request message to the global DNS address. Optionally, the first sending unit 204 is further configured to: when the first determining unit 202 determines that the destination site address of the DNS request is not a site-local address, directly forward the DNS request.

The user equipment of the technical solution of the foregoing embodiment of the present invention receives the DNS request from the user terminal, and obtains the global DNS address corresponding to the local address of the site if the destination site address of the DNS request packet is the site-local address; The technical means for the DNS address to send the DNS request message can also be understood as: when the destination device address is the site-local address, the local device performs the global DNS address redirection for the site-local address, that is, the DNS request packet is sent. Redirecting, so that there is no need to perform network deployment, and setting up a DNS resolution server in each site network, the user terminal host that has used the site local address can successfully implement DNS redirection, thereby improving DNS redirection technology. Implementation and address management efficiency.

As shown in FIG. 3, a schematic diagram of a DNS redirection user equipment applied to an IPv6 network is provided in the embodiment of the present invention. The client equipment 20 includes the first receiving unit 201, the first determining unit 202, and the first acquiring unit. The 203 and the first sending unit 204 may further include: a second receiving unit 205, configured to receive a DNS response packet from the global DNS server 30; and a second determining unit 206, configured to determine whether the DNS response packet is a redirect Response message; The second obtaining unit 207 is configured to: when the second determining unit 206 determines that the DNS response is a redirect response packet, obtain an address of the user terminal 10 corresponding to the DNS response packet; and the second sending unit 208 is configured to send to the user terminal The address of 10 sends a DNS response. Optionally, the second sending unit 208 is further configured to: when the second determining unit determines that the DNS response message is not the redirect response message, directly forward the DNS response message.

In addition, optionally, the client device may further include: a modifying unit, configured to: after the first obtaining unit 203 obtains the global DNS address corresponding to the site local address, modify the site local address of the DNS request message to the global DNS address, And notifying the first sending unit 204 to send a DNS request message to the global DNS address.

Optionally, the Customer Premise Equipment (CPE) refers to hardware that is physically located on the user side, at least one of the following: a server, a workstation, and a communication hardware (a channel service unit CSU/data service unit DSU, Modem), LAN LAN devices (hubs, bridges, switches), WAN WAN devices (routers).

The embodiment of the present invention is a CPE that can selectively redirect an IPv6 DNS request. When the destination site address of the IPv6 DNS request packet is a site-local address, the global DNS address corresponding to the local address of the site is redirected. Otherwise, the IPv6 DNS request can be directly forwarded. It can also be understood that when the destination station address is a site-local address, the site-local address is redirected, that is, the global DNS address is redirected to the DNS request packet. Thereby, the DNS response from the server corresponding to the global DNS address is further received and distributed, so that the user terminal host that has used the site local address can access the network normally, even if the user terminal that sends the DNS request can successfully request the DNS. Since the IPv6 DNS request sent by the user terminal host can be redirected to the global DNS server through a router or the like, the DHCPv6 server is not required, and the user terminal host does not need to support the DHCPv6 client, and the user terminal host automatically configures the IPv6 address through the router discovery mechanism. After that, the network can be accessed normally by sending a DNS request to the site-local address.

The above specific embodiments are not intended to limit the invention, and will be apparent to those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., which are made without departing from the principles of the invention, are intended to be included within the scope of the invention.

Claims

Claim

A method for redirecting a DNS based on an IPv6 network, the method comprising: receiving a DNS request packet from a user terminal;

If it is determined that the destination site address of the DNS singularity is a site-local address, obtaining a global DNS address corresponding to the site-local address;

Sending the DNS request to the global DNS address.

2. The method of claim 1 wherein:

If it is determined that the destination address of the DNS request is not a site-local address, the DNS request is directly forwarded.

3. The method of claim 1, wherein the method further comprises:

Receive DNS response packets from the global DNS server;

And if the DNS response packet is a redirect response packet, obtaining an address of the user terminal corresponding to the DNS response packet;

Sending the DNS response to the address of the user terminal.

4. The method of claim 3, wherein

If it is determined that the DNS response packet is not a redirect response packet, the DNS response packet is directly forwarded.

The method of claim 1, wherein after obtaining the global DNS address corresponding to the site local address, the site local address ί of the DNS request message is changed to the global DNS address, and then Sending the DNS request message to the global DNS address.

A user equipment of a DNS redirection based on an IPv6 network, where the user equipment includes:

a first receiving unit, configured to receive a DNS request message from the user terminal;

a first determining unit, configured to determine whether a destination site address of the DNS request packet is a site local address;

a first obtaining unit, configured to determine, by the first determining unit, a destination station of the DNS request message When the point address is a site-local address, the global DNS address corresponding to the site-local address is obtained. The first sending unit is configured to send the DNS request packet to the global DNS address.

7. The client device according to claim 6, wherein:

The first sending unit is further configured to: if the first determining unit determines that the destination site address of the DNS request packet is not a site-local address, directly forward the DNS request packet.

The user equipment according to claim 6, wherein the user equipment further comprises: a second receiving unit, configured to receive a DNS response message from the global DNS server; and a second determining unit, configured to determine Whether the DNS response packet is a redirect response packet, and the second obtaining unit is configured to: when the second determining unit determines that the DNS response packet is a redirect response packet, obtain the corresponding response of the DNS response packet The address of the user terminal;

And a second sending unit, configured to send the DNS response packet to an address of the user terminal.

9. The client device according to claim 8, wherein:

The second sending unit is further configured to: when the second determining unit determines that the DNS response packet is not a redirect response packet, directly forward the DNS response packet.

10. The user equipment according to claim 6, wherein the user equipment further includes:

a modifying unit, configured to: after the first obtaining unit acquires the global DNS address corresponding to the site local address, change the site local address of the DNS request message to the global DNS address, and notify the first A sending unit sends the DNS request message to the global DNS address.