60643d379b
(Including all changes for FreeBSD - importing the original eBones distribution would be too complex at this stage, since I don't have access to Piero's CVS.) (If you want to include eBones in your system, don't forget to include MAKE_EBONES in /etc/make.conf.) (This stuff is now also suppable from braae.ru.ac.za.) Bones originally from MIT SIPB. Original port to FreeBSD 1.x by Piero Serini. Moved to FreeBSD 2.0 by Doug Rabson and Geoff Rehmet. Nice bug fixes from Doug Rabson.
123 lines
4.0 KiB
Groff
123 lines
4.0 KiB
Groff
.\" from: klogind.8,v 4.1 89/01/23 11:39:30 jtkohl Exp $
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.\" $Id: klogind.8,v 1.2 1994/07/19 19:27:39 g89r4222 Exp $
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.\"
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.\" Copyright (c) 1983 The Regents of the University of California.
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.\" All rights reserved.
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.\"
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.\" Redistribution and use in source and binary forms are permitted
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.\" provided that the above copyright notice and this paragraph are
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.\" duplicated in all such forms and that any documentation,
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.\" advertising materials, and other materials related to such
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.\" distribution and use acknowledge that the software was developed
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.\" by the University of California, Berkeley. The name of the
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.\" University may not be used to endorse or promote products derived
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.\" from this software without specific prior written permission.
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.\" THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
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.\" IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
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.\" WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
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.\"
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.\" @(#)rlogind.8 6.4 (Berkeley) 9/19/88
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.\"
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.TH KLOGIND 8 "Kerberos Version 4.0" "MIT Project Athena"
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.UC 5
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.SH NAME
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klogind \- remote login server
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.SH SYNOPSIS
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.B /usr/etc/klogind
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.br
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.B /usr/etc/Klogind
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.br
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.B /usr/etc/eklogind
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.SH DESCRIPTION
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.I Klogind
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is the server for the Kerberos version of the
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.IR rlogin (1)
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program. The server provides a remote login facility
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with authentication provided by Kerberos.
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.PP
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.I Klogind
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listens for service requests at the port indicated in
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the ``klogin'' or ``eklogin'' service specification; see
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.IR services (5).
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.PP
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Invocation as Klogind is intended for secure
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hosts to which no password access will be granted; invocation as klogind
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is intended for normal hosts to which password access may be granted if
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Kerberos authorization fails; invocation as eklogind provides an
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encrypted communications channel. A host can run either Klogind or
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klogind but not both (they use the same port, ``klogin''). Eklogind may
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be run independently.
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.PP
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When a service request is received, the server checks the client's
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source address and requests the corresponding host name (see
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.IR gethostbyaddr (3N),
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.IR hosts (5)
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and
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.IR named (8)).
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If the hostname cannot be determined,
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the dot-notation representation of the host address is used.
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.PP
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Once the source address has been checked,
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.I klogind
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allocates a pseudo terminal (see
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.IR pty (4)),
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and manipulates file descriptors so that the slave
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half of the pseudo terminal becomes the
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.B stdin ,
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.B stdout ,
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and
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.B stderr
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for a login process.
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The login process is an instance of the
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.IR login (1)
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program, invoked with the
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.B \-k,
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.B \-K,
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or
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.B \-e
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option, depending on whether the klogind was started as klogind, Klogind
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or eklogind, respectively.
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The login process then proceeds with the
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authentication process as described in
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.IR kshd (8),
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but if automatic authentication fails, it reprompts the user
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to login as one finds on a standard terminal line.
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.PP
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The parent of the login process manipulates the master side of
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the pseudo terminal, operating as an intermediary
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between the login process and the client instance of the
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.I rlogin
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program. If klogind is invoked as eklogind, all data passed over
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the network are encrypted.
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In normal operation, the packet protocol described
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in
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.IR pty (4)
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is invoked to provide ^S/^Q type facilities and propagate
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interrupt signals to the remote programs. The login process
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propagates the client terminal's baud rate and terminal type,
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as found in the environment variable, ``TERM''; see
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.IR environ (7).
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The screen or window size of the terminal is requested from the client,
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and window size changes from the client are propagated to the pseudo terminal.
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.SH DIAGNOSTICS
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All diagnostic messages are returned on the connection
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associated with the
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.BR stderr ,
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after which any network connections are closed.
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An error is indicated by a leading byte with a value of 1.
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.PP
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.B ``Try again.''
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.br
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A
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.I fork
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by the server failed.
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.PP
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.B ``/bin/sh: ...''
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.br
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The user's login shell could not be started.
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.SH SEE ALSO
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kerberos(3)
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.SH BUGS
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.PP
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A more extensible protocol should be used.
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