Network Working Group Yuping Diao Internet-Draft Guangdong Commercial College Intended status: standard Yongping Diao Expires: December 23, 2012 ( ) Ming Liao ( ) June 23, 2012 DNS Extension for Autonomous Internet(AIP) draft-diao-aip-dns-01.txt Abstract With the reality of Internet, Autonomous Internet technology in this article constructs independent autonomous extensible domain name architecture and domain name hierarchy through current domain name architecture, provides independent root DNS server, inner/outer DNS resolution mechanism for each autonomous internet network system, and provides reformation and transition solution from current Internet to realize autonomy even in unilateral action. Status of this Memo This Internet-Draft is submitted to IETF in full conformance with the provisions of BCP 78 and BCP 79. Internet-Drafts are working documents of the Internet Engineering Task Force (IETF). Note that other groups may also distribute working documents as Internet-Drafts. The list of current Internet- Drafts is at http://datatracker.ietf.org/drafts/current/. Internet-Drafts are draft documents valid for a maximum of six months and may be updated, replaced, or obsoleted by other documents at any time. It is inappropriate to use Internet-Drafts as reference material or to cite them other than as "work in progress." This Internet-Draft will expire on December 13, 2012. Copyright Notice Copyright (c) 2012 IETF Trust and the persons identified as the document authors. All rights reserved. Diao, et al. Expires December 23, 2012 [Page 1] Internet-Draft DNS Extension for Autonomous Internet June 2012 This document is subject to BCP 78 and the IETF Trust's Legal Provisions Relating to IETF Documents (http://trustee.ietf.org/license-info) in effect on the date of publication of this document. Please review these documents carefully, as they describe your rights and restrictions with respect to this document. Code Components extracted from this document must include Simplified BSD License text as described in Section 4.e of the Trust Legal Provisions and are provided without warranty as described in the Simplified BSD License. Diao, et al. Expires December 23, 2012 [Page 2] Internet-Draft DNS Extension for Autonomous Internet June 2012 Table of Contents 1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . 4 1.1. Specification of Requirements . . . . . . . . . . . . . . . 4 2. Autonomous Internet DNS Design . . . . . . . . . . . . . . . . 4 2.1. AIP DNS Design Goal . . . . . . . . . . . . . . . . . . . . 4 2.2. AIP DNS Hierarchy . . . . . . . . . . . . . . . . . . . . . 5 2.3. AIP DNS Architecture and Transformation . . . . . . . . . . 6 3. AIP DNS Resolution Procedure. . . . . . . . . . . . . . . . . . 7 3.1. Domain Name Resolution within AIP Network . . . . . . . . . 7 3.2. Domain Name Resolution between AIP Networks . . . . . . . . 8 4. Conclusion . . . . . . . . . . . . . . . . . . . . . . . . . . 9 5. Security Considerations . . . . . . . . . . . . . . . . . . . 10 6. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 10 7. Acknowledgments . . . . . . . . . . . . . . . . . . . . . . . 10 8. References . . . . . . . . . . . . . . . . . . . . . . . . . . 10 8.1. Normative References . . . . . . . . . . . . . . . . . . . 10 8.2. Informative References . . . . . . . . . . . . . . . . . . 10 Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . . 11 Diao, et al. Expires December 23, 2012 [Page 3] Internet-Draft DNS Extension for Autonomous Internet June 2012 1. Introduction Internet Domain Name System (DNS) distributes domain name and IP address for the host on the Internet. DNS automatically translates the domain name into IP address when user accesses Internet using domain name. In current Internet domain name hierarchy, the root DNS server authorizes and distributes all sub-layer DNS servers. And by default it is to request the root DNS server service when any other DNS servers receive a non local domain name resolution request. DNS supports the Internet running normally. But its central control method is not suitable to autonomy and scalability and can't keep up with the fast development of Internet. To national internet network, owning its independent root DNS server and realize autonomy in Internet is a problem not only for the cost but also for the technical difficulty. It is almost impossible in current DNS architecture. 1.1. Specification of Requirements In this document, several words are used to signify the requirements of the specification. These words are often capitalized. The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT", "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this document are to be interpreted as described in [RFC2119]. 2. Autonomous Internet DNS Design 2.1. AIP DNS Design Goal Based on Internet practice, autonomous internet (AIP) techinology should even unilaterally transform the Internet into Autonomous Internet (AIP) without protocol change, using mode change, transition period. In the same time, Autonomous Internet system architecture designed should be safe and extensible; the reformation is the least possibly and the transition is smooth and feasible. To achieve the goal of Internet autonomy, AIP technology will construct an independent autonomous extensible domain name system and hierarchy based on current DNS, so that each AIP network has its own independent domain name hierarchy and root DNS servers; It provides the domain name resolution mechanism inner/outer AIP network system, so that the internal domain name resolution is no longer via the DNS outside this AIP network. Thus, the new generation Internet which uses the AIP technology will become a multi-polar system and provide full self-control ability to each AIP network. Diao, et al. Expires December 23, 2012 [Page 4] Internet-Draft DNS Extension for Autonomous Internet June 2012 2.2. AIP DNS Hierarchy The main rules of the Autonomous Internet DNS are defined as following: Rule 1: Each AIP network itself has a complete set of Domain Name System, which support traditional domain name resolution within the AIP. Rule 2: Each AIP network has its own numbered name that is different from the others. The numbered name is taken as the default domain name suffix when the internal domain name of this AIP network is cited by external AIP network. Any IP node's external domain name consists of its internal domain name and its AIP network default domain name suffix. Rule 3: When communicate between AIP networks, the access to IP node of external AIP network must use the IP node's external domain name. AIP Domain name system is autonomous, extensible. +------------------------------+ +------------------------------+ |Root "" | | "" Root | | _________|________ | | _________|________ | | / / | \ \ | | / / | \ \ | |Top edu com org gov ex(i)<+-+>ex(i) com cn Top| | /\ /\ | | /\ | | / \ / \ | | / \ | |Second baidu yahoo com cn | | baidu yahoo Second| | /\ | | /\ | | / \ | | / \ | |Host www mail | | www mail Host| | AIP Network A | | AIP Network B | +------------------------------+ +------------------------------+ Figure 1: Autonomous Internet domain name hierarchy According to the goal and DNS rules of AIP, the AIP domain name hierarchy of AIP can be designed as Fig. 1. In this figure, network A, B and ... are AIP networks; Domain node "www.yahoo.com" in network B is expressed as "www.yahoo.com.B" for its external domain name. At the same time, each AIP network domain name hierarchy tree adds the top-level domain name "ex(i)", so as to map the other external AIP network domain name hierarchy trees accessible from this AIP network. When ex(i)=B, it means the other AIP network B is accessible from this AIP network. Diao, et al. Expires December 23, 2012 [Page 5] Internet-Draft DNS Extension for Autonomous Internet June 2012 2.3. AIP DNS Architecture and Transformation According to the AIP DNS, we can construct AIP DNS architecture show as Fig. 2. Each AIP DNS has its root DNS servers, which are responsible for all the DNS resolution in this AIP network. Other DNS servers of this AIP point to these root DNS servers by default. . +-------------------------------.-------------------------------+ |+---------+ . | ||Root DNS <--------------------+ | || | .\ | |+----^----+ . +-----------------------+ | | | . | | |+----v----+ . +----v----+| || DNS | . | DNS || || (.us) | . | (.cn) || |+----^----+ . +----^----+| | | . | | |+----v----+ . +----v----+| || Host | . | Host || || N1(G1) | . | N2(G2) || |+---------+ . +---------+| | Internet | +-------------------------------.-------------------------------+ \./ V +------------------------------+ +------------------------------+ |+----------+ +----------+| |+----------+ +----------+| || Root DNS <------> AIP DNS <+-+> AIP DNS <------> Root DNS || || (A) | | GW A || || GW B | | (B) || |+----^-----+ +----^-----+| |+----^-----+ +----^-----+| | | | | | | |+----v-----+ | | +----v-----+| || DNS | | | | DNS || ||(.us/.com)| | | |(.cn/.com)|| |+----^-----+ | | +----^-----+| | | | | | | |+----v-----+ | | +----v-----+| || Host | | | | Host || || Na1(Ga1) | | | | Nb2(Gb2) || |+----------+ | | +----------+| | Internet/AIP network A | | AIP network B | +------------------------------+ +------------------------------+ Figure 2: AIP DNS architecture and transformation Diao, et al. Expires December 23, 2012 [Page 6] Internet-Draft DNS Extension for Autonomous Internet June 2012 Each AIP network is almost the same as the current Internet, and the internal domain name resolution and IP node communication have not any change. The only change is that the destination domain name need add domain name suffix of the destination AIP network when IP nodes communicate between different AIP networks. Therefore, each AIP network will add a device called "AIP DNS gateway" (AIP DNS GW) to support domain name resolution between AIP networks. On one hand, it forwards its external DNS resolution request to the destination AIP network, returns the DNS resolution result to internal requester; On the other hand, it receives DNS resolution request from external AIP networks, feedback the DNS resolution result to the external AIP network requester, which at first it would get the internal DNS resolution result according to the traditional way. In order to realize the transition from Internet to Autonomous Internet, each partition of current Internet should first realize possible self-government and gradually reduce its dependence on the foreign domain names, such as COM, NET et al. Then to each AIP network, we can establish a new autonomous DNS, or Upgrade one part of current Internet DNS (core part or non core part) to a new autonomous DNS. Unilateral action: It is not likely the whole Internet can be transformed synchronally in one time. In order not to affect existing domain name resolution before the Internet core part transforms into an AIP network, any country can set up an AIP DNS independently and connect to the Internet through the original link; or any two countries in agreement can set up their AIP networks and connect to each others. There is something different in the unilateral action. On one hand, the upgrade work is including of new added local AIP network root DNS server to construct an independent DNS, and an AIP DNS GW deployment to support domain name resolution between AIP networks. On the other hand, it is necessary to add a pre-transformed AIP DNS GW in each AIP network connecting to the Internet (core part) DNS instead of the original transformation requirement for Internet core part. The pre-transformed AIP DNS GW would initiatively add the domain name suffix to the domain name from the existing Internet (core part), which is the only difference from normal AIP DNS GW. 3. AIP DNS Resolution Procedure 3.1. Domain Name Resolution within AIP Network Within each AIP network, domain name resolution keeps traditional method. Diao, et al. Expires December 23, 2012 [Page 7] Internet-Draft DNS Extension for Autonomous Internet June 2012 3.2. Domain Name Resolution between AIP Networks Between AIP networks, external domain name of destination IP node should be provided for domain name resolution. Assume that a host in AIP network A has domain name Na1 and global IP address Ga1. Another host in AIP network B has domain name Nb2=www.yahoo.com, whose external domain name is www.yahoo.com.B. Fig. 3 shows the DNS query procedure between AIP network A and B when host Na1 request for the domain name resolution of host Nb2. This domain name resolution procedure between AIP networks is described as following: Host DNS Root DNS AIP DNS :AIP DNS Root DNS DNS Na1 (A) (A) GW A : GW B (B) (B) | | | | : | | | |-Nb2.B->| | | : | | | | |-Nb2.B->| | : | | | | |<.......| | : | | | | | | | : | | | | |------Nb2.B----->| : | | | | | | |-Nb2.B->| | | | | | | : |--Nb2-->| | | | | | : |<.......| | | | | | : | | | | | | | : |-------Nb2------>| | | | | : |<----------------| | | | |<-------| | | | |<----------------| : | | | |<-------| | | : | | | | | | | : | | | Internet/AIP network A : AIP network B Figure 3: DNS query procedure between AIP networks Step 1: Source host Na1 request for the resolution of external domain name "Nb2.B", and send the query to local DNS server through host's resolver. Step 2: When receive the query, Local DNS server inquire its cache and return the result. But if there is no record for the query, local DNS server would send query to root DNS server of local AIP network A. Step 3: Root DNS server of local AIP network A return a primary DNS server IP address of queried domain (sub-domain of AIP network A's root domain name, here is B, which mirrors external DNS hierarchy of another AIP network B) to local DNS server, namely the IP address of AIP DNS GW A in AIP network A. Diao, et al. Expires December 23, 2012 [Page 8] Internet-Draft DNS Extension for Autonomous Internet June 2012 Step 4: Local DNS server send the query to the returned DNS server (AIP DNS GW A) IP address again. 1) When receive the query, AIP DNS GW A inquire its cache and return the result. But if there is no record for the query, AIP DNS GW A would send query to AIP DNS GW B in AIP network B. 2) When receive the query, AIP DNS GW B inquire its cache and return the result. But if there is no record for the query, AIP DNS GW B would get rid of the local AIP network domain name suffix ".B" from external domain name "Nb2.B", then send query with the internal domain name "Nb2" to root DNS server of local AIP network B. 3) Root DNS server of local AIP network B return a primary DNS server IP address of queried domain (sub-domain of root domain name, such as COM) to AIP DNS GW B. 4) AIP DNS GW B sends the query to the last step 3) returned DNS server IP address again. After receive the query, this DNS server inquire (its cache) and return the corresponding record or the corresponding lower-level DNS server IP address. 5) AIP DNS GW B repeats last step 4) until it finds the correct record, namely the IP address Gb2 of the domain name Nb2. 6) AIP DNS GW B turns the internal domain name "Nb2" into external domain name "Nb2.B" in the returned result by adding local AIP network domain name suffix "B", and then caches the result and return the result to AIP DNS GW A. Step 5: AIP DNS GW A caches the returned result and return the result to local DNS server. Step 6: Local DNS server caches the returned result and returns the result to source host Na1. Therefore, host Na1 (Ga1) now can communicate with host Nb2 (Gb2) after it gets the IP address of the destination host Nb2. 4. Conclusion Autonomous Internet DNS provides a technology to realize Internet autonomy, which can own independent root DNS server even in unilateral action. And it could be realized in high independence, extensible usage, the least cost and non transition period. It is hopeful to establish future autonomous extensible multi-polar Internet and resolve the autonomous problem of Internet. Diao, et al. Expires December 23, 2012 [Page 9] Internet-Draft DNS Extension for Autonomous Internet June 2012 5. Security Considerations There is no additional security requirement than current domain name system. Security issues are not discussed in this memo. 6. IANA Considerations As described by AIP DNS rule 2 in Section 2.2, different AIP network default domain name suffix needs to be assigned by IANA. 7. Acknowledgments The authors would like to thank everybody for their valuable opinion and evaluation to this document. 8. References 8.1. Normative References [RFC 791] Postel, J., ed., "Internet Protocol - DARPA Internet Program Protocol Specification", RFC 791, September 1981. [RFC1034] Mockapetris, P., "Domain names - concepts and facilities", STD 13, RFC 1034, November 1987. [RFC1035] Mockapetris, P., "Domain names - Implementation and Specification", STD 13, RFC 1035, November 1987. [RFC2460] Deering, S. and R. Hinden, "Internet Protocol, Version 6 (IPv6) Specification", RFC 2460, December 1998. 8.2. Informative References [RFC1706] B. Manning, and R. Colella, "DNS NSAP Resource Records", RFC 1706, October 1994. [RFC3596] S. Thomson, C. Huitema, V. Ksinant, and M. Souissi, "DNS Extensions to Support IP Version 6", RFC 3596, October 2003. [RFC2782] A. Gulbrandsen, P. Vixie, and L. Esibov, "A DNS RR for specifying the location of services (DNS SRV)", RFC 2782, February 2000. Diao, et al. Expires December 23, 2012 [Page 10] Internet-Draft DNS Extension for Autonomous Internet June 2012 Authors' Addresses Yuping Diao Information Institute of Guangdong Commercial College, 21 Luntou Road, Haizhu District, Guangzhou 510320, China. Email: teacherdddd@yahoo.com.cn Yongping Diao ( ) Guangzhou 510630, China. Email: diaoyp@yahoo.com Ming Liao ( ) Guangzhou 510631, China. Email: luminous@yahoo.com Diao, et al. Expires December 23, 2012 [Page 11]