Browse Prior Art Database

Embedding Globally-Routable Internet Addresses Considered Harmful (RFC4085)

IP.com Disclosure Number: IPCOM000125599D
Original Publication Date: 2005-Jun-01
Included in the Prior Art Database: 2005-Jun-09
Document File: 11 page(s) / 23K

Publishing Venue

Internet Society Requests For Comment (RFCs)

Related People

D. Plonka: AUTHOR

Abstract

This document discourages the practice of embedding references to unique, globally-routable IP addresses in Internet hosts, describes some of the resulting problems, and considers selected alternatives. This document is intended to clarify best current practices in this regard.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 13% of the total text.

Global Routing Operations                                      D. Plonka
Network Working Group                            University of Wisconsin
Request for Comments: 4085                                     June 2005
BCP: 105
Category: Best Current Practice


   Embedding Globally-Routable Internet Addresses Considered Harmful

Status of This Memo

   This document specifies an Internet Best Current Practices for the
   Internet Community, and requests discussion and suggestions for
   improvements.  Distribution of this memo is unlimited.

Copyright Notice

   Copyright (C) The Internet Society (2005).

Abstract

   This document discourages the practice of embedding references to
   unique, globally-routable IP addresses in Internet hosts, describes
   some of the resulting problems, and considers selected alternatives.
   This document is intended to clarify best current practices in this
   regard.

Table of Contents

   1. Introduction ....................................................2
   2. Problems ........................................................2
   3. Recommendations .................................................4
      3.1. Disable Unused Features ....................................4
      3.2. Provide User Interface for IP Features .....................4
      3.3. Use Domain Names as Service Identifiers ....................4
      3.4. Use Special-Purpose, Reserved IP Addresses When Available ..5
      3.5. Discover and Utilize Local Services ........................6
      3.6. Avoid Mentioning the IP Addresses of Services ..............6
   4. Security Considerations .........................................6
   5. Conclusion ......................................................7
   6. Acknowledgements ................................................7
   7. References ......................................................7
   Appendix A.  Background ............................................9


Plonka                   Best Current Practice                  [Page 1]
RFC 4085       Embedding IP Addresses Considered Harmful       June 2005


1.  Introduction

   Some vendors of consumer electronics and network gear have
   unfortunately chosen to embed, or "hard-code", globally-routable
   Internet Protocol addresses within their products' firmware.  These
   embedded IP addresses are typically individual server IP addresses or
   IP subnet prefixes.  Thus, they are sometimes used as service
   identifiers, to which unsolicted requests are directed, or as subnet
   identifiers, specifying sets of Internet addresses that the given
   product somehow treats specially.

   One recent example was the embedding of the globally-routable IP
   address of a Network Time Protocol server in the firmware...