WO2007041927A1 - Méthode de mappage d’adresses pendant un message de réaction à nat d’un dns - Google Patents

Méthode de mappage d’adresses pendant un message de réaction à nat d’un dns Download PDF

Info

Publication number
WO2007041927A1
WO2007041927A1 PCT/CN2006/002290 CN2006002290W WO2007041927A1 WO 2007041927 A1 WO2007041927 A1 WO 2007041927A1 CN 2006002290 W CN2006002290 W CN 2006002290W WO 2007041927 A1 WO2007041927 A1 WO 2007041927A1
Authority
WO
WIPO (PCT)
Prior art keywords
network
address
ipv4
ipv6
nat
Prior art date
Application number
PCT/CN2006/002290
Other languages
English (en)
Chinese (zh)
Inventor
Hongfei Chen
Yuan Zhang
Original Assignee
Huawei Technologies Co., Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Huawei Technologies Co., Ltd. filed Critical Huawei Technologies Co., Ltd.
Publication of WO2007041927A1 publication Critical patent/WO2007041927A1/fr

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L61/00—Network arrangements, protocols or services for addressing or naming
    • H04L61/09—Mapping addresses
    • H04L61/25—Mapping addresses of the same type
    • H04L61/2503—Translation of Internet protocol [IP] addresses
    • H04L61/2557—Translation policies or rules
    • 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]

Definitions

  • Domain name resolution server should address mapping method in network address translation
  • the present invention relates to a network address translation method, and more particularly to the address mapping method in network address translation.
  • NAT Network Address Translation
  • IETF Internet Engineering Task Force
  • IETF Internet Engineering Task Force
  • the NAT-PT transition mechanism is to solve the problem of IPv4 host and IPv6 host mutual access and propose one of the IPv6 over-technology, in RFC2766 - Network Address Translation - Protocol Translation (NAT-PT), RFC2765 - Stateless IP/ICMP Translation Algorithm (SIIT) defines the address allocation method for IPv6 and IPv4 nodes when they access each other.
  • SIIT Stateless IP/ICMP Translation Algorithm
  • NAT-PT When an IPv6 node starts to access an IPv4 node, the NAT-PT is from the IPv4 address.
  • An IPv4 address is dynamically allocated to the IPv6 node in the buffer pool.
  • NAT-PT provides transparent routing for inter-communication between nodes in IPv6 and IPv4 domains by translating and binding IPv6 and IPv4 addresses without making changes to the nodes. This requires NAT-PT to track the established communication session, and the packets belonging to the session pass through the same NAT-PT router.
  • NAT in the NAT-PT and the IPv4 private network address to access the public network address are mainly different.
  • NAT-FT is the conversion of two different address structure packets. Most of the access needs to be completed through DNS.
  • IPv4 NAT the DNS server in the private network can be configured with a public network address. DNS requests and responses do not need to be translated through NAT.
  • NAT-PT the request and response between the IPv6 domain and the DNS server in the IPv4 domain must be Converted by NAT-PT.
  • the DNS message for the IPV6 DNS response carries the IPv6 address of the requested website, which specifies that the NAT-PT translates this address into an IPv4 address and establishes an IPv6 address.
  • the mapping relationship of one IPv4 address since the actual server needs to use the server group mode because of the service needs, the same domain name may obtain multiple IP addresses through DNS request, so the NAT-PT network address translation must be for each Assign an IPv4 address to an IPv6 address and establish a mapping relationship. Only one of these mappings actually works. Since IPv4 addresses are scarce resources, the IPv4 address pool will be consumed quickly.
  • the technical problem to be solved by the present invention is to provide a method for address mapping in a domain name resolution server response message network address translation, in which a DNS response message carries multiple IPv6 addresses and only one of them actually acts, reducing Consumption of IPv4 addresses.
  • the domain name resolution server of the present invention responds to the address mapping method in the network address translation of the message, and includes:
  • a first network address is mapped to a second network address, and address mapping of network address translation is implemented.
  • the first network is an IPv6 network
  • the second network is an IPv4 network.
  • FIG. 1 is a schematic diagram of a network structure of an IPv4 node accessing an IPv6 node through a DNS.
  • the core of the present invention is to perform a network address translation on the received domain name resolution server response message returned by the first network node, and return the domain name resolution server response message in the domain name resolution server response message to the second network.
  • Multiple first network addresses all or one of them is mapped to a second network address to implement network address translation address mapping, especially for When an IPv6 network node returns a response message to the IPv4 network node name resolution server, all or a plurality of IPv6 addresses in the response message may be mapped to one IPv4 address, since there is no need for each IPv6 address. Mapping an IPv4 address can reduce IPv4 address consumption. The following is a specific example.
  • this figure is a schematic diagram of a network structure in which an IPv4 node accesses an IPv6 node through DNS.
  • nodes A and B both have an IPv6 address
  • node C has an IPv4 address.
  • the NAT-PT device that performs network address translation has an IPv4 address buffer pool
  • DNS1 has an IPv4 address
  • DNS4 has an IPv6 address.
  • the node C sends a request packet for domain name resolution of the node A
  • the resolution request is first transmitted to the DNS1 of the IPv4 domain
  • the DNS1 sends the request message to the DNS4 of the IPv6 domain
  • the request packet crosses the boundary.
  • the NAT-PT device performs network address translation on the A request record (A record, defined by the DNS protocol) into the IPv6 domain, and returns the DNS response packet from the DNS server in the IPv6 domain to the IPv4 domain.
  • a request record A record, defined by the DNS protocol
  • the NAT-PT device When requesting a node, the NAT-PT device performing network address translation performs network address translation on the DNS response message. If the node IPv4-C (assuming the IPv4 address is 1.1.1.1) requests the address of the node IPv6-A, it returns from the IPv6 DNS server.
  • the response message to the NAT-PT contains multiple IPv6 addresses of the node A, such as three addresses, which are 2001::1, 2001::2, 2001::3. At this time, there are multiple IPv6 addresses corresponding to the IPv6-A node.
  • the present invention provides two solutions:
  • the NAT-PT device selects only one IPv6 address for translation, and other IPv6 addresses are directly discarded.
  • the method of selection may be to select the first one, the smallest one, the random selection, and so on. In this way, you only need to assign an IPv4 address from the IPv4 address pool, such as 10.1.1.1, to establish a mapping relationship.
  • the modification of the IPv6 DNS response message by the NAT-PT device includes: modifying the AAAA record (AAAA record, defined by the DNS protocol) into an A record; A selected IPv6 address is mapped to an IPv4 address in the IPv4 address pool.
  • IPv4 address such as 10.1.1.1
  • the IPv4-C node does not know that IPv6-A has three IP addresses, and only knows that the IPv4 address of IPv6-A is 10.1.1.1. All subsequent accesses are made for the 10.1.1.1 address.
  • the three mappings are identified as one mapping group, one mapping is selected as active, and subsequent mappings are used. Conversion, once this mapping is interrupted, choose to activate one from the other mapping relationships. In this case, if an address fails, the IPv4-C node does not need to re-acquire the IP address through the DNS.
  • the NAT-PT device modifies the IPv6 DNS response message by including:
  • the two methods of the present invention can ensure that an IPv4 host accesses only one IPv4 address for a domain name, and does not affect the access of the IPv4 server to the IPv6 server.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)

Abstract

La méthode de mappage d’adresses pendant un message de réaction à NAT d’un DNS comprend : réception d’un message de réaction de DNS retourné par le premier nœud de réseau ; lorsque la traduction d’adresse réseau pour ledit message de réaction de DNS retourné par le premier réseau, dans ledit message de réaction de DNS, mappage au moins de l’une des premières adresses réseau parmi les multiples premières adresses réseau retournées en réaction à la requête du deuxième DNS de réseau à une adresse du deuxième réseau, implémentation du mappage d’adresses de la traduction d’adresses réseau. La présente invention peut réduire efficacement la consommation d’adresses ipv4.
PCT/CN2006/002290 2005-10-14 2006-09-04 Méthode de mappage d’adresses pendant un message de réaction à nat d’un dns WO2007041927A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN200510100410.4 2005-10-14
CN2005101004104A CN1949783B (zh) 2005-10-14 2005-10-14 域名解析服务器应答报文网络地址转换中的地址映射方法

Publications (1)

Publication Number Publication Date
WO2007041927A1 true WO2007041927A1 (fr) 2007-04-19

Family

ID=37942301

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2006/002290 WO2007041927A1 (fr) 2005-10-14 2006-09-04 Méthode de mappage d’adresses pendant un message de réaction à nat d’un dns

Country Status (2)

Country Link
CN (1) CN1949783B (fr)
WO (1) WO2007041927A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101640679B (zh) * 2009-04-13 2012-07-18 山石网科通信技术（北京）有限公司 域名解析代理方法和装置
CN102572008B (zh) * 2010-12-08 2016-08-31 中国电信股份有限公司 通信业务处理方法与系统、网关设备
CN107707683B (zh) * 2017-05-22 2018-06-08 贵州白山云科技有限公司 一种减小dns报文长度的方法和装置
CN113873054A (zh) * 2021-09-13 2021-12-31 支付宝(杭州)信息技术有限公司 基于DNS的IPv6引流方法、装置以及设备

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1380773A (zh) * 2002-04-25 2002-11-20 复旦大学 一种增强的nat－pt协议方案
CN1463130A (zh) * 2002-05-29 2003-12-24 三星电子株式会社 在IPv4和IPv6之间用于通信数据的方法和装置
US20040004940A1 (en) * 2002-07-02 2004-01-08 Nischal Abrol Communication system supporting transition between network communication protocols
EP1450544A2 (fr) * 2003-02-18 2004-08-25 Samsung Electronics Co., Ltd. Dispositif et procédé pour la conversion de IPv4 vers IPv6 utilisant une double pile

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1380773A (zh) * 2002-04-25 2002-11-20 复旦大学 一种增强的nat－pt协议方案
CN1463130A (zh) * 2002-05-29 2003-12-24 三星电子株式会社 在IPv4和IPv6之间用于通信数据的方法和装置
US20040004940A1 (en) * 2002-07-02 2004-01-08 Nischal Abrol Communication system supporting transition between network communication protocols
EP1450544A2 (fr) * 2003-02-18 2004-08-25 Samsung Electronics Co., Ltd. Dispositif et procédé pour la conversion de IPv4 vers IPv6 utilisant une double pile

Also Published As

Publication number Publication date
CN1949783A (zh) 2007-04-18
CN1949783B (zh) 2011-03-16

Similar Documents

Publication Publication Date Title
US7302496B1 (en) Arrangement for discovering a localized IP address realm between two endpoints
JP4234482B2 (ja) 動的ｄｎｓ登録方法、ドメイン名解決方法、代理サーバ、及びアドレス変換装置
US7573903B2 (en) IPv6/IPv4 translator
Srisuresh et al. Load sharing using IP network address translation (LSNAT)
US7010585B2 (en) DNS server, DHCP server, terminal and communication system
JP4786747B2 (ja) ミドルボックスにおけるｉｐアドレス分散
JP3903014B2 (ja) インターネットプロトコルアドレス変換装置及びこれを用いたホームネットワークシステム並びにその通信方法
JP3735348B2 (ja) インターネットプロトコルアドレス変換装置、これを用いた通信ネットワークシステム及び通信方法
TWI441493B (zh) 網路位址轉換的系統與方法
JP5239618B2 (ja) アドレス変換装置、方法及びプログラム、並びにノード
WO2012051915A1 (fr) Procédé et dispositif pour le mappage d'accès, et système de communications
WO2008000188A1 (fr) Procédé et système pour réaliser une interaction de flux multimédia, contrôleur de passerelle multimédia, et passerelle multimédia
WO2011147353A1 (fr) Procédé et appareil de transmission de message
JP4766976B2 (ja) ノード間接続方法及び装置
KR20050086925A (ko) 이종 ｉｐ 네트워크에서 클라이언트와 서버 사이의 통신을구축하는 시스템 및 방법
WO2010045809A1 (fr) Procédé, passerelle multimédia, et système de réseau permettant de réaliser la traduction d'adresses réseau
CN110691150A (zh) 一种基于SDN的IPv4与IPv6互联方法及系统
JP2007074172A (ja) プライベートネットワーク間接続システム及びアドレス変換装置
KR100652958B1 (ko) 홈 게이트웨이의 네트워크 주소변환 방법의 개선을 통한 데이터 전송방법 및 그 시스템
WO2007041927A1 (fr) Méthode de mappage d’adresses pendant un message de réaction à nat d’un dns
JP3915230B2 (ja) パケット生成方法およびその機能を有する情報処理装置並びにパケット生成プログラムを記録した記録媒体
TW201414253A (zh) 網路位址轉換系統及方法
JP3646936B2 (ja) ＩＰｖ６無線ＬＡＮ環境でのＩＰｖ４管理方法および管理装置
KR20050039880A (ko) 제 1 컴퓨터 네트워크로부터 제 2 컴퓨터 네트워크로의통신 세션들 개시
KR100355288B1 (ko) 사설망 호스트에 서비스 서버 기능을 부여하는 장치 및 방법

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application
NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 06775606

Country of ref document: EP

Kind code of ref document: A1