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This draft is a work item of the Routing Area Working Group Working Group of the IETF.
Title : The Generalized TTL Security Mechanism (GTSM)
Author(s) : V. Gill, J. Heasley, D. Meyer
Filename : draft-ietf-rtgwg-rfc3682bis-01.txt
Pages : 14
Date : 2004-3-18
The use of a packet's TTL (IPv4) or Hop Limit (IPv6) to protect a
protocol stack from CPU-utilization based attacks has been proposed
in many settings (see for example, RFC 2461). This document
generalizes these techniques for use by other protocols such as BGP
(RFC 1771), MSDP, Bidirectional Forwarding Detection, and LDP (RFC
3036). While the Generalized TTL Security Mechanism (GTSM) is most
effective in protecting directly connected protocol peers, it can
also provide a lower level of protection to multi-hop sessions. GTSM
is not directly applicable to protocols employing flooding mechanisms
(e.g., multicast), and use of multi-hop GTSM should be considered on
a case-by-case basis.
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