An Update for DCCP Connection Establishment to Assist NAT & Firewall Traversal

Document Type Replaced Internet-Draft (individual)
Last updated 2008-02-29 (latest revision 2007-11-16)
Replaced by draft-ietf-dccp-simul-open
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This Internet-Draft is no longer active. A copy of the expired Internet-Draft can be found at


This document proposes an update to the Datagram Congestion Control Protocol (DCCP), a connection-oriented and datagram-based transport protocol. The update assists DCCP applications that need to traverse middleboxes (e.g. Network Address Translators or firewalls), where peering endpoints need to nearly simultaneously initiate the connection to establish middlebox state required for communication.


Gorry Fairhurst (
Gerrit Renker (

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