Domain Name System Media Types
RFC 4027
| Document | Type |
RFC - Informational
(May 2005; No errata)
Was draft-josefsson-mime-dns (individual in app area)
|
|
|---|---|---|---|
| Last updated | 2013-03-02 | ||
| Stream | IETF | ||
| Formats | plain text pdf html bibtex | ||
| Stream | WG state | (None) | |
| Document shepherd | No shepherd assigned | ||
| IESG | IESG state | RFC 4027 (Informational) | |
| Consensus Boilerplate | Unknown | ||
| Telechat date | |||
| Responsible AD | Ted Hardie | ||
| Send notices to | (None) | ||
Network Working Group S. Josefsson
Request for Comments: 4027 April 2005
Category: Informational
Domain Name System Media Types
Status of This Memo
This memo provides information for the Internet community. It does
not specify an Internet standard of any kind. Distribution of this
memo is unlimited.
Copyright Notice
Copyright (C) The Internet Society (2005).
Abstract
This document registers the media types application/dns and text/dns
in accordance with RFC 2048. The application/dns media type is used
to identify data on the detached Domain Name System (DNS) format
described in RFC 2540. The text/dns media type is used to identify
master files as described in RFC 1035.
Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . 1
2. MIME Type Registration of application/dns . . . . . . . . . . 2
3. MIME Type Registration of text/dns . . . . . . . . . . . . . . 3
4. Security Considerations . . . . . . . . . . . . . . . . . . . 4
5. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 4
6. Acknowledgements . . . . . . . . . . . . . . . . . . . . . . . 4
A. Disclaimer and License . . . . . . . . . . . . . . . . . . . . 5
Normative References . . . . . . . . . . . . . . . . . . . . . 5
Informative References . . . . . . . . . . . . . . . . . . . . 5
Author's Address . . . . . . . . . . . . . . . . . . . . . . . 5
Full Copyright Statements. . . . . . . . . . . . . . . . . . . 6
1. Introduction
Domain Name System (DNS) [1] information is traditionally stored in
text files, so-called master files or zone files. The format is
described in section 5 of RFC 1035 [2].
DNS data can also be stored in a "detached" format, intended for
archiving purposes, described in RFC 2540 [4].
Josefsson Informational [Page 1]
RFC 4027 Domain Name System Media Types April 2005
This document registers MIME media types for the two data formats,
with the registration procedures described in RFC 2048 [3].
2. MIME Type Registration of application/dns
To: ietf-types@iana.org
Subject: Registration of MIME media type application/dns
MIME media type name: application
MIME subtype name: dns
Required parameters: None.
Optional parameters: None.
Encoding considerations: The data format is binary, and data must be
transfered unmodified. Using encodings intended for textual parts is
not recommended.
Security considerations: This media type identifies content as being
detached DNS information, as documented in RFC 2540 [4]. This data
may be security relevant as per RFC 2538 [7] or may be secured
information as per RFC 2535 [6]. Securing the content further may be
done with standard techniques, such as OpenPGP [5] or CMS [9], but
this is outside of the scope here. Further security assessments are
not available at this point.
Interoperability considerations: The encoding of detached DNS
information is, unlike textual master files, well defined. No
further interoperability considerations are known.
Published specification: The format of data that could be tagged with
this media type is documented in RFC 2540 [4].
Applications that use this media type: DNS-related software,
including software storing and using certificates stored in DNS.
Additional information:
Magic number(s): None.
File extension(s): Unknown.
Macintosh File Type Code(s): Unknown.
Person & email address to contact for further information:
Simon Josefsson simon@josefsson.org
Intended usage: LIMITED USE
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RFC 4027 Domain Name System Media Types April 2005
Author/change controller: simon@josefsson.org
3. MIME Type Registration of text/dns
To: ietf-types@iana.org
Subject: Registration of MIME media type text/dns
MIME media type name: text
MIME subtype name: dns
Required parameters: None.
Optional parameters: None.
Encoding considerations: The data is textual and should be transfered
in a line-oriented mode. Text literals may contain CRLF within the
text. Binary transport is possible between systems that use the same
end-of-line conventions. Master files are in general ASCII, but
non-ASCII octet values may occur and are treated as opaque values by
DNS software (compare RFC 1035, section 5). The master file format
permits encoding arbitrary octet values by using the "\DDD" encoding.
The use of "\DDD" encoding can be more reliable than transporting
non-ASCII through MIME transports, if data passes through a gateway
that re-encodes the character data.
Security considerations: This media type identifies content as being
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