Requirements for Discovering Middleboxes

Document Type Expired Internet-Draft (individual)
Author Eliot Lear 
Last updated 2001-04-05
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This Internet-Draft is no longer active. A copy of the expired Internet-Draft can be found at


The end to end nature of the Internet has been broken. Boxes within the middle of the network may change contents of packets at the Internet layer or above without the knowledge of the end devices. As these middleboxes such as NATs and firewalls have proliferated within the Internet, protocols are being developed to communicate with them. This document addresses requirements for discovery of those boxes.


Eliot Lear (

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