A TCP Option for Port Names

Document Type Expired Internet-Draft (individual in tsv area)
Author Joseph Touch 
Last updated 2015-10-14 (latest revision 2006-04-17)
Stream Internet Engineering Task Force (IETF)
Intended RFC status (None)
Expired & archived
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Stream WG state (None)
Document shepherd No shepherd assigned
IESG IESG state Expired (IESG: Dead)
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Responsible AD Lars Eggert
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This Internet-Draft is no longer active. A copy of the expired Internet-Draft can be found at


This document specifies a new TCP option that specifies services by a string name. This option separates the use of port numbers for connection demultiplexing from their use as a service identifier. The option allows a larger number of concurrent connections for a particular service, as well as potentially enabling more explicitly coordination of services behind NATs and firewalls. This option should be supported in new TCP implementations.


Joseph Touch (touch@isi.edu)

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