Network Working Group O. Gsenger Internet-Draft March 10, 2007 Expires: September 11, 2007 Anycast stream relaying draft-gsenger-anycast-relay-00 Status of this Memo By submitting this Internet-Draft, each author represents that any applicable patent or other IPR claims of which he or she is aware have been or will be disclosed, and any of which he or she becomes aware will be disclosed, in accordance with Section 6 of BCP 79. 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. This Internet-Draft will expire on September 11, 2007. Copyright Notice Copyright (C) The IETF Trust (2007). Gsenger Expires September 11, 2007 [Page 1] Internet-Draft Anycast stream relaying March 2007 Abstract The anycast tunneling (anytun) protocol defines a protocol used for communication between unicast clients and anycast servers. It can be used for tunneling information between 2 clients or in relay mode to transmit data form the client over the servers to a third party not using the protocol and vice versa. Gsenger Expires September 11, 2007 [Page 2] Internet-Draft Anycast stream relaying March 2007 1. Introduction anytun defines a Host Anycast Service as defined in rfc1546. It can be used to build high scalable and redundant tunnel services. It supports both UDP and TCP connections. Additionally to the possibility of establashing an unicast TCP connection over an anycast address as suggested in rfc1546, it supports real anycast TCP connections with state syncronisation and heuristic state forecast. It also has a relay mode, that makes it possible, that only one of the connection endpoints has to use the anytun protocol. This can be used to make connections through Firewalls or behind a NAT Router RFC3068 [1] DTD. 1.1. Tunneling Mode In tunneling mode the payload of the anytun packet is transmitted from one unicast host to the anycast server. This server makes a routing descision based on the underlying protocol and transmits a new anytun package to one or more clients depending on the routing descition. 1.2. Relay Mode Gsenger Expires September 11, 2007 [Page 3] Internet-Draft Anycast stream relaying March 2007 Appendix A. The appan Gsenger Expires September 11, 2007 [Page 4] Internet-Draft Anycast stream relaying March 2007 2. References [1] Huitema, C., "An Anycast Prefix for 6to4 Relay Routers", RFC 3068, June 2001. Gsenger Expires September 11, 2007 [Page 5] Internet-Draft Anycast stream relaying March 2007 Author's Address Othmar Gsenger Sporgasse 6 Graz 8010 AT Phone: Email: otti@wirdorange.org URI: http://anytun.org/ Gsenger Expires September 11, 2007 [Page 6] Internet-Draft Anycast stream relaying March 2007 Full Copyright Statement Copyright (C) The IETF Trust (2007). This document is subject to the rights, licenses and restrictions contained in BCP 78, and except as set forth therein, the authors retain all their rights. 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Information on the procedures with respect to rights in RFC documents can be found in BCP 78 and BCP 79. Copies of IPR disclosures made to the IETF Secretariat and any assurances of licenses to be made available, or the result of an attempt made to obtain a general license or permission for the use of such proprietary rights by implementers or users of this specification can be obtained from the IETF on-line IPR repository at http://www.ietf.org/ipr. The IETF invites any interested party to bring to its attention any copyrights, patents or patent applications, or other proprietary rights that may cover technology that may be required to implement this standard. Please address the information to the IETF at ietf-ipr@ietf.org. Acknowledgment Funding for the RFC Editor function is provided by the IETF Administrative Support Activity (IASA). Gsenger Expires September 11, 2007 [Page 7]