Considerations for the use of DNS Reverse Mapping

Document Type Expired Internet-Draft (dnsop WG)
Authors Daniel Senie  , Andrew Sullivan 
Last updated 2008-03-13
Stream Internet Engineering Task Force (IETF)
Intended RFC status (None)
Expired & archived
pdf htmlized bibtex
Stream WG state WG Document
Document shepherd No shepherd assigned
IESG IESG state Expired
Consensus Boilerplate Unknown
Telechat date
Responsible AD (None)
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This Internet-Draft is no longer active. A copy of the expired Internet-Draft can be found at


Mapping of addresses to names is a feature of DNS. Many sites implement it, many others do not. Some applications attempt to use it as a part of a security strategy. This document outlines what should be taken into account when deciding whether to implement reverse mappings of addresses to names, suggests that site administrators implement reverse mappings if there are no strong considerations against such mappings, and provides considerations to be taken into account when using reverse mappings.


Daniel Senie (
Andrew Sullivan (

(Note: The e-mail addresses provided for the authors of this Internet-Draft may no longer be valid.)