[FYI] .sex Considered Dangerous
<http://www.ietf.org/rfc/rfc3675.txt>
Network Working Group D. Eastlake 3rd
Request for Comments: 3675 Motorola Laboratories
Category: Informational February 2004
.sex Considered Dangerous
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 (2004). All Rights Reserved.
Abstract
Periodically there are proposals to mandate the use of a special top
level name or an IP address bit to flag "adult" or "unsafe" material
or the like. This document explains why this is an ill considered
idea from the legal, philosophical, and particularly, the technical
points of view.
Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . 2
2. Background . . . . . . . . . . . . . . . . . . . . . . . . . . 2
3. Legal and Philosophical Problems . . . . . . . . . . . . . . . 4
4. Technical Difficulties . . . . . . . . . . . . . . . . . . . . 6
4.1. Content Filtering Using Names. . . . . . . . . . . . . . 7
4.1.1. Linguistic Problems. . . . . . . . . . . . . . . 7
4.1.2. Explosion of Top Level Domain Names (TLDs) . . . 8
4.1.3. You Can't Control What Names Point At You! . . . 9
4.1.4. Particular Protocol Difficulties . . . . . . . . 10
4.1.4.1. Electronic Mail (SMTP) . . . . . . . . 10
4.1.4.2. Web Access (HTTP). . . . . . . . . . . 11
4.1.4.3. News (NNTP). . . . . . . . . . . . . . 12
4.1.4.4. Internet Relay Chat (IRC). . . . . . . 13
4.2. Content Filtering Using IP Addressing. . . . . . . . . . 13
4.2.1. Hierarchical Routing . . . . . . . . . . . . . . 14
4.2.2. IP Version 4 Addresses . . . . . . . . . . . . . 15
4.2.3. IP Version 6 Addresses . . . . . . . . . . . . . 15
4.3. PICS Labels. . . . . . . . . . . . . . . . . . . . . . . 16
5. Security Considerations. . . . . . . . . . . . . . . . . . . . 17
6. Conclusions. . . . . . . . . . . . . . . . . . . . . . . . . . 17
7. References . . . . . . . . . . . . . . . . . . . . . . . . . . 18
7.1. Normative References . . . . . . . . . . . . . . . . . . 18
7.2. Informative References . . . . . . . . . . . . . . . . . 19
8. Acknowledgement. . . . . . . . . . . . . . . . . . . . . . . . 21
9. Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . 21
10. Full Copyright Statement . . . . . . . . . . . . . . . . . . . 22
1. Introduction
Periodically there are proposals to mandate the use of a special top
level name or an IP address bit to flag "adult" or "unsafe" material
or the like. This document explains why this is an ill considered
idea from the legal, philosophical, and the technical points of view.
[...]
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