Name: draft-ietf-rtgwg-rfc3682bis-04
Title: The Generalized TTL Security Mechanism (GTSM)
State: Active
Authors: Vijay Gill, John Heasley, David Meyer
Group: Routing Area Working Group (rtgwg)
Date: 2004-09-30
The use of a packet's Time to Live (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
Detection, and Label Distribution Protocol (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. This document
obsoletes RFC 3682.
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