From 172540a4a29fa4c0c5f0431bb5bf5b3d08ec92c0 Mon Sep 17 00:00:00 2001 From: KatolaZ Date: Fri, 8 Feb 2019 05:13:11 +0000 Subject: New upstream version 0.17 --- fingerd/fingerd.8 | 157 ++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 157 insertions(+) create mode 100644 fingerd/fingerd.8 (limited to 'fingerd/fingerd.8') diff --git a/fingerd/fingerd.8 b/fingerd/fingerd.8 new file mode 100644 index 0000000..9daa95b --- /dev/null +++ b/fingerd/fingerd.8 @@ -0,0 +1,157 @@ +.\" 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. +.\" +.\" from: @(#)fingerd.8 6.4 (Berkeley) 3/16/91 +.\" $Id: fingerd.8,v 1.18 2000/07/30 23:56:57 dholland Exp $ +.\" +.Dd August 29, 1996 +.Dt FINGERD 8 +.Os "Linux NetKit (0.17)" +.Sh NAME +.Nm fingerd +.Nd remote user information server +.Sh SYNOPSIS +.Nm fingerd +.Op Fl wulf +.Op Fl pL Ar path +.Op Fl t Ar timeout +.Sh DESCRIPTION +.Nm Fingerd +is a simple daemon based on +.%T RFC1196 +that provides an interface to the +.Dq finger +program at most network sites. +The program is supposed to return a friendly, +human-oriented status report on either the system at the moment +or a particular person in depth. +.Pp +If the +.Fl w +option is given, remote users will get an additional +.Dq Welcome to ... +banner +which also shows some informations (e.g. uptime, operating system name and +release) about the system the +.Nm fingerd +is running on. Some sites may consider this a security risk as it +gives out information that may be useful to crackers. +.Pp +If the +.Fl u +option is given, requests of the form +.Dq finger @host +are rejected. +.Pp +If the +.Fl l +option is given, information about requests made is logged. This +option probably violates users' privacy and should not be used on +multiuser boxes. +.Pp +If the +.Fl f +option is given, finger forwarding (user@host1@host2) is allowed. +Useful behind firewalls, but probably not wise for security and +resource reasons. +.Pp +The +.Fl p +option allows specification of an alternate location for fingerd to find +the +.Dq finger +program. The +.Fl L +option is equivalent. +.Pp +The +.Fl t +option specifies the time to wait for a request before closing the +connection. A value of 0 waits forever. The default is 60 seconds. +.Pp +Options to fingerd should be specified in +.Pa /etc/inetd.conf . +.Pp +The finger protocol consists mostly of specifying command arguments. +The +.Xr inetd 8 +.Dq super-server +runs +.Nm fingerd +for +.Tn TCP +requests received on port 79. +Once connected +.Nm fingerd +reads a single command line +terminated by a +.Aq Tn CRLF +which is passed to +.Xr finger 1 . +It closes its connections as soon as all output is finished. +.Pp +If the line is empty (i.e. just a +.Aq Tn CRLF +is sent) then +.Xr finger +returns a +.Dq default +report that lists all people logged into +the system at that moment. This feature is blocked by the +.Fl u +option. +.Pp +If a user name is specified (e.g. +.Pf eric Aq Tn CRLF ) +then the +response lists more extended information for only that particular user, +whether logged in or not. +Allowable +.Dq names +in the command line include both +.Dq login names +and +.Dq user names . +If a name is ambiguous, all possible derivations are returned. +.Sh SEE ALSO +.Xr finger 1 , +.Xr inetd 8 +.Sh RESTRICTIONS +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. +.Sh HISTORY +The finger daemon appeared in +.Bx 4.3 . -- cgit v1.2.3