Transient pseudo-NAT attacks or how NATs are even more evil than you believed

Document Type Expired Internet-Draft (individual)
Authors Francis Dupont  , Jean-Jacques Bernard 
Last updated 2004-06-29
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This Internet-Draft is no longer active. A copy of the expired Internet-Draft can be found at


When a 'NAT traversal' capability is added to a class of signaling protocols which can control some traffic aggregation points, an attack based on a temporary access to the path followed by messages exists. Mobile IP [1] with NAT traversal [5] or IKE [2] with NAT traversal [6], including the IKEv2 [7] proposal, are potentially affected by this kind of attacks. This document claims this vulnerability is an intrinsic property of the NAT traversal capability, so is another point where the usage of NATs is very damaging.


Francis Dupont (
Jean-Jacques Bernard (

(Note: The e-mail addresses provided for the authors of this Internet-Draft may no longer be valid.)