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-.\" from: klogind.8,v 4.1 89/01/23 11:39:30 jtkohl Exp $
-.\" $Id: klogind.8,v 1.2 1994/07/19 19:27:39 g89r4222 Exp $
-.\"
-.\" Copyright (c) 1983 The Regents of the University of California.
-.\" All rights reserved.
-.\"
-.\" Redistribution and use in source and binary forms are permitted
-.\" provided that the above copyright notice and this paragraph are
-.\" duplicated in all such forms and that any documentation,
-.\" advertising materials, and other materials related to such
-.\" distribution and use acknowledge that the software was developed
-.\" by the University of California, Berkeley. The name of the
-.\" University may not be used to endorse or promote products derived
-.\" from this software without specific prior written permission.
-.\" THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
-.\" IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
-.\" WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
-.\"
-.\" @(#)rlogind.8 6.4 (Berkeley) 9/19/88
-.\"
-.TH KLOGIND 8 "Kerberos Version 4.0" "MIT Project Athena"
-.UC 5
-.SH NAME
-klogind \- remote login server
-.SH SYNOPSIS
-.B /usr/etc/klogind
-.br
-.B /usr/etc/Klogind
-.br
-.B /usr/etc/eklogind
-.SH DESCRIPTION
-.I Klogind
-is the server for the Kerberos version of the
-.IR rlogin (1)
-program. The server provides a remote login facility
-with authentication provided by Kerberos.
-.PP
-.I Klogind
-listens for service requests at the port indicated in
-the ``klogin'' or ``eklogin'' service specification; see
-.IR services (5).
-.PP
-Invocation as Klogind is intended for secure
-hosts to which no password access will be granted; invocation as klogind
-is intended for normal hosts to which password access may be granted if
-Kerberos authorization fails; invocation as eklogind provides an
-encrypted communications channel. A host can run either Klogind or
-klogind but not both (they use the same port, ``klogin''). Eklogind may
-be run independently.
-.PP
-When a service request is received, the server checks the client's
-source address and requests the corresponding host name (see
-.IR gethostbyaddr (3N),
-.IR hosts (5)
-and
-.IR named (8)).
-If the hostname cannot be determined,
-the dot-notation representation of the host address is used.
-.PP
-Once the source address has been checked,
-.I klogind
-allocates a pseudo terminal (see
-.IR pty (4)),
-and manipulates file descriptors so that the slave
-half of the pseudo terminal becomes the
-.B stdin ,
-.B stdout ,
-and
-.B stderr
-for a login process.
-The login process is an instance of the
-.IR login (1)
-program, invoked with the
-.B \-k,
-.B \-K,
-or
-.B \-e
-option, depending on whether the klogind was started as klogind, Klogind
-or eklogind, respectively.
-The login process then proceeds with the
-authentication process as described in
-.IR kshd (8),
-but if automatic authentication fails, it reprompts the user
-to login as one finds on a standard terminal line.
-.PP
-The parent of the login process manipulates the master side of
-the pseudo terminal, operating as an intermediary
-between the login process and the client instance of the
-.I rlogin
-program. If klogind is invoked as eklogind, all data passed over
-the network are encrypted.
-In normal operation, the packet protocol described
-in
-.IR pty (4)
-is invoked to provide ^S/^Q type facilities and propagate
-interrupt signals to the remote programs. The login process
-propagates the client terminal's baud rate and terminal type,
-as found in the environment variable, ``TERM''; see
-.IR environ (7).
-The screen or window size of the terminal is requested from the client,
-and window size changes from the client are propagated to the pseudo terminal.
-.SH DIAGNOSTICS
-All diagnostic messages are returned on the connection
-associated with the
-.BR stderr ,
-after which any network connections are closed.
-An error is indicated by a leading byte with a value of 1.
-.PP
-.B ``Try again.''
-.br
-A
-.I fork
-by the server failed.
-.PP
-.B ``/bin/sh: ...''
-.br
-The user's login shell could not be started.
-.SH SEE ALSO
-kerberos(3)
-.SH BUGS
-.PP
-A more extensible protocol should be used.
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