Skip to main content

File Transfer Protocol LOCK Command for Using a Single Port

Document Type Expired Internet-Draft (individual)
Expired & archived
Authors Anthony Bryan , Daniel Stenberg , Tatsuhiro Tsujikawa
Last updated 2013-08-05 (Latest revision 2013-02-01)
RFC stream (None)
Intended RFC status (None)
Stream Stream state (No stream defined)
Consensus boilerplate Unknown
RFC Editor Note (None)
IESG IESG state Expired
Telechat date (None)
Responsible AD (None)
Send notices to (None)

This Internet-Draft is no longer active. A copy of the expired Internet-Draft is available in these formats:


One of the biggest hurdles for FTP in real life usage is its use of two connections. First, it uses a primary connection to send control commands on, and when it sends or receives data, it opens a second TCP stream for that purpose. This document specifies a new FTP LOCK command to be used by clients to request the server to use the control connection for data transfers, using a single port instead of two.


Anthony Bryan
Daniel Stenberg
Tatsuhiro Tsujikawa

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