Browse Prior Art Database

Telnet logger/server for host LL-67 (RFC0466)

IP.com Disclosure Number: IPCOM000006052D
Original Publication Date: 1973-Feb-27
Included in the Prior Art Database: 2001-Nov-29
Document File: 10 page(s) / 18K

Publishing Venue

Internet Society Requests For Comment (RFCs)

Related People

J.M. Winett: AUTHOR

Abstract

The attached writeup documents the TELNET LOGGER/SERVER for the CP/CMS system on the Lincoln Laboratory 360>67 (host 10). The facility serves both half duplex and full duplex TELNET users with data in either ASCII or EBCDIC codes.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 27% of the total text.

Network Working Group                                          J. Winett

Request for Comments: 466                                          LL-67

NIC: 14740                                              27 February 1973

Category: TELNET

                  TELNET LOGGER/SERVER For Host LL-67

   The attached writeup documents the TELNET LOGGER/SERVER for the

   CP/CMS system on the Lincoln Laboratory 360>67 (host 10).  The

   facility serves both half duplex and full duplex TELNET users with

   data in either ASCII or EBCDIC codes.

   Use of the hide-your-input and noecho TELNET controls are used for

   the EBCDIC print suppress (bypass) and print restore features during

   the login procedure.  To support half duplex terminals, the TELNET

   control break (reverse break) is sent as an input prompt when input

   is desired.  This code can also be used to indicate that a previous

   line sent without an end of line sequence (CR-LF) should be printed.

   This material has not been reviewed for public release and is

   intended only for use with the ARPA network.  It should not be quoted

   or cited in any publication not related to the ARPA network.

Winett                                                          [Page 1]

RFC 466           TELNET LOGGER/SERVER For Host LL-67      February 1973

                    Operation of the Lincoln Laboratory

                        CP/CMS TELNET LOGGER/SERVER

ICP Connection

   The TELNET LOGGER/SERVER follows the ICP protocol for making a pair

   of connections.  The LOGGER is initially enabled for a connection on

   socket X'00000001'.  When an RFC is received for this socket a pair

   of sockets will be chosen for the TELNET connections.  If the maximum

   number of TELNET users which can be served are active, the initial

   connection is refused.  Currently, three TELNET users can be served.

TELNET LOGGER

   After the ICP connections have been setup, the LOGGER expects a

   TELNET data type code, a string of network ASCII characters, or a

   null line (just CR-LF) to indicate whether its operation should be in

   ASCII or in EBCDIC character codes.  ASCII is assumed unless the

   first byte received is the TELNET EBCDIC data type code (X'A2).  When

   something has been received, the message:

                     Lincoln Laboratory CP/CMS Online

   will be transmitted by the LOGGER.  For example, if ASCII operation

   is desired a null line (just CR-LF) transmitted on the send socket

   will cause the welcoming message to be sent in ASCII.  The CP login

   procedure can then begin.  If communications is desired to be carried

   on with EBCDIC character codes, the first byte transmitted should be

   the TELNET data type code for EBCDIC (X'A2').  Thereafter all

   communications will be in the code originally used.

   The CP login procedure expects the user to enter:

                               LOGIN userid

   where the userid specifies the desired virtual machine.  CP then

   replies with:

                              ENTER PASSWORD:

   followed by the EBCDIC code for bypass (x'24') which is mapped into

   the TELNET code hide-your-input.

   The user should then enter a password.  Passwords entered from the

   network may be different from those entered from a local terminal.

   The LOGGER maps network passwords into a corresponding CP password.

   Thus, access to an account can only be made from the network if a

   network password, together with a CP password and userid, is en...