.\" Copyright (c) 1980, 1991 The Regents of the University of California. .\" All rights reserved. .\" .\" Redistribution and use in source and binary forms, with or without .\" modification, are permitted provided that the following conditions .\" are met: .\" 1. Redistributions of source code must retain the above copyright .\" notice, this list of conditions and the following disclaimer. .\" 2. Redistributions in binary form must reproduce the above copyright .\" notice, this list of conditions and the following disclaimer in the .\" documentation and/or other materials provided with the distribution. .\" 3. All advertising materials mentioning features or use of this software .\" must display the following acknowledgement: .\" This product includes software developed by the University of .\" California, Berkeley and its contributors. .\" 4. Neither the name of the University nor the names of its contributors .\" may be used to endorse or promote products derived from this software .\" without specific prior written permission. .\" .\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND .\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE .\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE .\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE .\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL .\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS .\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) .\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT .\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY .\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF .\" SUCH DAMAGE. .\" .\" Portions of the code documented by this man page are .\" Copyright (C) 1991 by the Massachusetts Institute of Technology. .\" Please see the file COPYING for details. .\" .\" .\" from: @(#)fingerd.8 6.4 (Berkeley) 3/16/91 .\" from: fingerd.8,v 1.1 1994/06/08 15:12:24 rzsfl Exp rzsfl .\" $Id: writed.8,v 1.12 2000/07/30 23:57:11 dholland Exp $ .\" .\" Rewritten as writed.8, Apr 29 1996, dholland@hcs.harvard.edu .\" .Dd April 29, 1996 .Dt WRITED 8 .Os "Linux NetKit (0.17)" .Sh NAME .Nm writed .Nd remote write server .Sh SYNOPSIS .Nm writed .Sh DESCRIPTION .Nm Writed implements a very simple protocol that allows a .Xr write 1 program on one host to connect up to one on another host, allowing communications across the network. The details of this protocol are intentionally not described in this man page in order to discourage fraudulent usage. This constitutes a bug. .Pp .Nm Writed is meant to be run from .Xr inetd 8 listening for .Tn TCP requests on port 811. .Sh SEE ALSO .Xr write 1 .Sh BUGS Connecting directly to the server from a .Tn TIP or an equally narrow-minded .Tn TELNET Ns \-protocol user program can result in meaningless attempts at option negotiation being sent to the server, which will foul up the command line interpretation. .Nm Writed should be taught to filter out .Tn IAC Ns \'s and perhaps even respond negatively .Pq Tn IAC WON'T to all option commands received. .Pp No attempt is made to determine the authenticity of users sending messages. .Sh HISTORY The .Nm command was developed at MIT in conjunction with Project Athena and is essentially a hackup of .Xr fingerd 8 .