Hadmut Danisch wrote: > Is there any? If not, shouldn't there be one? > E.g. as an RFC? Here is an old Internet Draft, which IESG at that time refused to make it RFC, because some wanted to call NAT providers ISPs. Masataka Ohta -- INTERNET DRAFT M. Ohta draft-ohta-isps-00.txt Tokyo Institute of Technology July 2000 The Internet and ISPs Status of this Memo This document is an Internet-Draft and is in full conformance with all provisions of Section 10 of RFC2026. Internet-Drafts are working documents of the Internet Engineering Task Force (IETF), its areas, and its working groups. Note that other groups may also distribute working documents as Internet- Drafts. Internet-Drafts are draft documents valid for a maximum of six months and may be updated, replaced, or obsoleted by other documents at any time. It is inappropriate to use Internet- Drafts as reference material or to cite them other than as "work in progress." The list of current Internet-Drafts can be accessed at http://www.ietf.org/ietf/1id-abstracts.txt The list of Internet-Draft Shadow Directories can be accessed at http://www.ietf.org/shadow.html. Copyright (C) The Internet Society (May/1/2000). All Rights Reserved. Abstract This memo gives definitions on the Internet and ISPs (Internet Service Providers). 1. The Internet The Internet is a public IP [1, 2] network globally connected end to end [3] at the Internetworking layer. 2. ISPs A network provider is an ISP, if and only if its network, including access parts of the network to its subscribers, is a part of the Internet. As such, ISPs must preserve the end to end and globally connected principles of the Internet at the Internetworking layer. M. Ohta Expires on January 1, 2001 [Page 1] INTERNET DRAFT ISPs July 2000 A network provider of a private IP or non-IP network, which is connected to the Internet through an application and/or transport gateway is not an ISP. Dispit the requirement of "global connectivity", a network provider may use transparent firewalls to the Internet with no translation to filter out a limited number of problematic well known ports of TCP and/or UDP and can still be an ISP. However, if filtering out is a default and only a limited number of protocols are allowed to pass the firewalls (which means snooping of transport/application layer protocols), it can not be regarded as full connectivity to the Internet and the provider is not an ISP. 3. Security Considerations While some people may think that filtering by application/transport gateways offer some sort of security, they should recognize that macro virus in e-mails can pass and are passing through all such gateways. 4. References [1] J. Postel, "Internet Protocol", RFC791, September 1981. [2] S. Deering, R. Hinden, "Internet Protocol, Version 6 (IPv6) Specification", RFC2460, December 1998. [3] B. Carpenter, "Architectural Principles of the Internet", RFC1958, June 1996. 5. Author's Address Masataka Ohta Computer Center, Tokyo Institute of Technology 2-12-1, O-okayama, Meguro-ku, Tokyo 152-8550, JAPAN Phone: +81-3-5734-3299 Fax: +81-3-5734-3415 EMail: mohta@xxxxxxxxxxxxxxxxxxxxxxxxxx M. Ohta Expires on January 1, 2001 [Page 2] INTERNET DRAFT ISPs July 2000 6. Full Copyright Statement "Copyright (C) The Internet Society (July/1/2000). All Rights Reserved. This document and translations of it may be copied and furnished to others, and derivative works that comment on or otherwise explain it or assist in its implementation may be prepared, copied, published and distributed, in whole or in part, without restriction of any kind, provided that the above copyright notice and this paragraph are included on all such copies and derivative works. However, this document itself may not be modified in any way, such as by removing the copyright notice or references to the Internet Society or other Internet organizations, except as needed for the purpose of developing Internet standards in which case the procedures for copyrights defined in the Internet Standards process must be followed, or as required to translate it into languages other than English. The limited permissions granted above are perpetual and will not be revoked by the Internet Society or its successors or assigns. This document and the information contained herein is provided on an "AS IS" basis and THE INTERNET SOCIETY AND THE INTERNET ENGINEERING TASK FORCE DISCLAIMS ALL WARRANTIES, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO ANY WARRANTY THAT THE USE OF THE INFORMATION HEREIN WILL NOT INFRINGE ANY RIGHTS OR ANY IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. M. Ohta Expires on January 1, 2001 [Page 3] _______________________________________________ Ietf@xxxxxxxx https://www1.ietf.org/mailman/listinfo/ietf