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Network Working Group Alex McKenzie
Request for Comments: 593 BBN
Jon Postel
MITRE
Telnet and FTP Implementation Schedule Change
Telnet and FTP Implementation Schedule Change
We have been contacted by several Telnet implementers and concerned
users regarding the scheduled changeover from old to new Telnet.
There is a good deal of concern about accomplishing a coordinated
changeover especially in light of the potential incompatibilities
(RFC 559, NIC18482). Therefore the changeover is reformulated as
follows.
New Telnet implementations are to be ready 1 Jan 74 (as before), but
are to use ICP socket 23 (decimal). That is the server Telnet will
listen on socket 23, and user Telnet programs will connect to socket
23. It will also be useful for the user program to let the user
optionally select the server socket, as many user Telnet programs
currently do. It will also be useful for implementers to consider a
server Telnet program capable of dealing with both protocols as MIT-
DMCG has done (RFC 559). This will provide an opportunity for
testing and debugging the new programs in a way that does not
interfere with normal use.
During January we will survey the technical liaisons to determine the
status of the Telnet implementations. As soon as we determine that
the Telnet implementations have reached a point where the changeover
can be made without disruption of user services the technical
liaisons will be notified.
In light of this change in the Telnet implementation schedule, the
FTP schedule is also modified. New FTP implementations are to be
ready by 1 Feb 74 (as before), but will continue to use ICP socket 21
(decimal) until we can determine that a changeover is appropriate.
References
Telnet Protocol NIC 18639
File Transfer Protocol NIC 17759
[This RFC was put into machine readable form for entry ]
[into the online RFC archives by Mirsad Todorovac 5/98 ]
McKenzie & Postel [Page 1]
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