A Firewall/NAT Traversal Client for CASP

Document Type Expired Internet-Draft (individual)
Authors Hannes Tschofenig  , Henning Schulzrinne  , Cedric Aoun 
Last updated 2003-03-07
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This Internet-Draft is no longer active. A copy of the expired Internet-Draft can be found at


This document describes a CASP client protocol that allows nodes to signal information to firewalls both in an in-path and off-path fashion. The protocol furthermore allows to establish a NAT binding and to provide the signaling initiator with the NAT information. This is information can then be used within other protocols such as SIP.


Hannes Tschofenig (Hannes.Tschofenig@gmx.net)
Henning Schulzrinne (hgs+geopriv@cs.columbia.edu)
Cedric Aoun (cedric.aoun@nortelnetworks.com)

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