IETF RFC 5082
The Generalized TTL Security Mechanism (GTSM)
|Publication Date:||1 October 2007|
The use of a packet's Time to Live (TTL) (IPv4) or Hop Limit (IPv6) to verify whether the packet was originated by an adjacent node on a connected link has been used in many recent protocols. This document generalizes this technique. This document obsoletes Experimental RFC 3682.