Locally Served DNS Zones
RFC 6303
Document | Type |
RFC - Best Current Practice
(July 2011; No errata)
Also known as BCP 163
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Author | Mark Andrews | ||
Last updated | 2015-10-14 | ||
Stream | IETF | ||
Formats | plain text html pdf htmlized bibtex | ||
Stream | WG state | WG Document | |
Document shepherd | No shepherd assigned | ||
IESG | IESG state | RFC 6303 (Best Current Practice) | |
Action Holders |
(None)
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||
Consensus Boilerplate | Unknown | ||
Telechat date | |||
Responsible AD | Ron Bonica | ||
Send notices to | (None) |
Internet Engineering Task Force (IETF) M. Andrews Request for Comments: 6303 ISC BCP: 163 July 2011 Category: Best Current Practice ISSN: 2070-1721 Locally Served DNS Zones Abstract Experience with the Domain Name System (DNS) has shown that there are a number of DNS zones that all iterative resolvers and recursive nameservers should automatically serve, unless configured otherwise. RFC 4193 specifies that this should occur for D.F.IP6.ARPA. This document extends the practice to cover the IN-ADDR.ARPA zones for RFC 1918 address space and other well-known zones with similar characteristics. Status of This Memo This memo documents an Internet Best Current Practice. This document is a product of the Internet Engineering Task Force (IETF). It represents the consensus of the IETF community. It has received public review and has been approved for publication by the Internet Engineering Steering Group (IESG). Further information on BCPs is available in Section 2 of RFC 5741. Information about the current status of this document, any errata, and how to provide feedback on it may be obtained at http://www.rfc-editor.org/info/rfc6303. Copyright Notice Copyright (c) 2011 IETF Trust and the persons identified as the document authors. All rights reserved. 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. Andrews Best Current Practice [Page 1] RFC 6303 Locally Served DNS Zones July 2011 This document may contain material from IETF Documents or IETF Contributions published or made publicly available before November 10, 2008. The person(s) controlling the copyright in some of this material may not have granted the IETF Trust the right to allow modifications of such material outside the IETF Standards Process. Without obtaining an adequate license from the person(s) controlling the copyright in such materials, this document may not be modified outside the IETF Standards Process, and derivative works of it may not be created outside the IETF Standards Process, except to format it for publication as an RFC or to translate it into languages other than English. Table of Contents 1. Introduction ....................................................2 1.1. Reserved Words .............................................3 2. Effects on Sites Using RFC 1918 Addresses .......................3 3. Changes to Iterative Resolver Behaviour .........................4 4. Lists Of Zones Covered ..........................................5 4.1. RFC 1918 Zones .............................................5 4.2. RFC 5735 and RFC 5737 Zones ................................5 4.3. Local IPv6 Unicast Addresses ...............................6 4.4. IPv6 Locally Assigned Local Addresses ......................6 4.5. IPv6 Link-Local Addresses ..................................7 4.6. IPv6 Example Prefix ........................................7 5. Zones That Are Out of Scope .....................................7 6. IANA Considerations .............................................8 7. Security Considerations .........................................8 8. Acknowledgements ................................................9 9. References ......................................................9 9.1. Normative References .......................................9 9.2. Informative References ....................................10 1. Introduction Experience with the Domain Name System (DNS, [RFC1034] and [RFC1035]) has shown that there are a number of DNS zones that all iterative resolvers and recursive nameservers SHOULD automatically serve, unless intentionally configured otherwise. These zones include, but are not limited to, the IN-ADDR.ARPA zones for the address space allocated by [RFC1918] and the IP6.ARPA zones for locally assigned unique local IPv6 addresses defined in [RFC4193]. Andrews Best Current Practice [Page 2] RFC 6303 Locally Served DNS Zones July 2011 This recommendation is made because data has shown that significant leakage of queries for these namespaces is occurring, despiteShow full document text