1.\" Copyright (c) 1980, 1991, 1993 2.\" The Regents of the University of California. All rights reserved. 3.\" 4.\" Redistribution and use in source and binary forms, with or without 5.\" modification, are permitted provided that the following conditions 6.\" are met: 7.\" 1. Redistributions of source code must retain the above copyright 8.\" notice, this list of conditions and the following disclaimer. 9.\" 2. Redistributions in binary form must reproduce the above copyright 10.\" notice, this list of conditions and the following disclaimer in the 11.\" documentation and/or other materials provided with the distribution. 12.\" 3. All advertising materials mentioning features or use of this software 13.\" must display the following acknowledgement: 14.\" This product includes software developed by the University of 15.\" California, Berkeley and its contributors. 16.\" 4. Neither the name of the University nor the names of its contributors 17.\" may be used to endorse or promote products derived from this software 18.\" without specific prior written permission. 19.\" 20.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 21.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 24.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30.\" SUCH DAMAGE. 31.\" 32.\" @(#)fingerd.8 8.1 (Berkeley) 6/4/93 33.\" 34.Dd June 4, 1993 35.Dt FINGERD 8 36.Os BSD 4.3 37.Sh NAME 38.Nm fingerd 39.Nd remote user information server 40.Sh SYNOPSIS 41.Nm fingerd 42.Op Fl s 43.Op Fl l 44.Op Fl p Ar filename 45.Sh DESCRIPTION 46.Nm Fingerd 47is a simple protocol based on 48.%T RFC1196 49that provides an interface to the 50Name and Finger programs at several network sites. 51The program is supposed to return a friendly, 52human-oriented status report on either the system at the moment 53or a particular person in depth. 54There is no required format and the 55protocol consists mostly of specifying a single 56.Dq command line . 57.Pp 58.Nm Fingerd 59listens for 60.Tn TCP 61requests at port 79. 62Once connected it reads a single command line 63terminated by a 64.Aq Tn CRLF 65which is passed to 66.Xr finger 1 . 67.Nm Fingerd 68closes its connections as soon as the output is finished. 69.Pp 70If the line is null (i.e. just a 71.Aq Tn CRLF 72is sent) then 73.Xr finger 74returns a 75.Dq default 76report that lists all people logged into 77the system at that moment. 78.Pp 79If a user name is specified (e.g. 80.Pf eric Aq Tn CRLF ) 81then the 82response lists more extended information for only that particular user, 83whether logged in or not. 84Allowable 85.Dq names 86in the command line include both 87.Dq login names 88and 89.Dq user names . 90If a name is ambiguous, all possible derivations are returned. 91.Pp 92The following options may be passed to 93.Nm fingerd 94as server program arguments in 95.Pa /etc/inetd.conf : 96.Bl -tag -width Ds 97.It Fl s 98Enable secure mode. 99Queries without a user name are rejected and 100forwarding of queries to other remote hosts is denied. 101.It Fl l 102Enable logging. 103The name of the host originating the query is reported via 104.Xr syslog 3 105at LOG_NOTICE priority. 106.It Fl p 107Use an alternate program as the local information provider. 108The default local program 109executed by 110.Nm fingerd 111is 112.Xr finger 1 . 113By specifying a customized local server, 114this option allows a system manager 115to have more control over what information is 116provided to remote sites. 117.El 118.Sh SEE ALSO 119.Xr finger 1 120.Sh BUGS 121Connecting directly to the server from a 122.Tn TIP 123or an equally narrow-minded 124.Tn TELNET Ns \-protocol 125user program can result 126in meaningless attempts at option negotiation being sent to the 127server, which will foul up the command line interpretation. 128.Nm Fingerd 129should be taught to filter out 130.Tn IAC Ns \'s 131and perhaps even respond 132negatively 133.Pq Tn IAC WON'T 134to all option commands received. 135.Sh HISTORY 136The 137.Nm 138command appeared in 139.Bx 4.3 . 140