RFC 3123 (rfc3123) - Page 1 of 8

A DNS RR Type for Lists of Address Prefixes (APL RR)

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Network Working Group                                            P. Koch
Request for Comments: 3123                        Universitaet Bielefeld
Category: Experimental                                         June 2001


          A DNS RR Type for Lists of Address Prefixes (APL RR)

Status of this Memo

   This memo defines an Experimental Protocol for the Internet
   community.  It does not specify an Internet standard of any kind.
   Discussion and suggestions for improvement are requested.
   Distribution of this memo is unlimited.

Copyright Notice

   Copyright (C) The Internet Society (2001).  All Rights Reserved.

Abstract

   The Domain Name System (DNS) is primarily used to translate domain
   names into IPv4 addresses using A RRs (Resource Records).  Several
   approaches exist to describe networks or address ranges.  This
   document specifies a new DNS RR type "APL" for address prefix lists.

1. Conventions used in this document

   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 [RFC 2119].

   Domain names herein are for explanatory purposes only and should not
   be expected to lead to useful information in real life [RFC 2606].

2. Background

   The Domain Name System [RFC 1034], [RFC 1035] provides a mechanism to
   associate addresses and other Internet infrastructure elements with
   hierarchically built domain names.  Various types of resource records
   have been defined, especially those for IPv4 and IPv6 [RFC 2874]
   addresses.  In [RFC 1101] a method is described to publish information
   about the address space allocated to an organisation.  In older BIND
   versions, a weak form of controlling access to zone data was
   implemented using TXT RRs describing address ranges.

   This document specifies a new RR type for address prefix lists.





Koch                          Experimental
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