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FINGERD(8)             DragonFly System Manager's Manual            FINGERD(8)


NAME

     fingerd -- remote user information server


SYNOPSIS

     fingerd [-s] [-l] [-p filename]


DESCRIPTION

     The fingerd utility uses a simple protocol based on RFC 1196 that pro-
     vides an interface to finger(1) at several network sites.  It is supposed
     to return a friendly, human-oriented status report on either the system
     at the moment or a particular person in depth.  There is no required for-
     mat and the protocol consists mostly of specifying a single ``command
     line'', thus, fingerd can also be used to implement other protocols in
     conjunction with the -p flag.

     The fingerd utility is started by inetd(8), which listens for TCP
     requests at port 79.  Once connected it reads a single command line ter-
     minated by a <CRLF> which is passed to finger(1).  The fingerd utility
     closes its connections as soon as the output is finished.

     If the line is null (i.e., just a <CRLF> is sent) then finger(1) returns
     a ``default'' report that lists all people logged into the system at that
     moment.

     If a user name is specified (e.g. eric<CRLF>) then the response lists
     more extended information for only that particular user, whether logged
     in or not.  Allowable ``names'' in the command line include both ``login
     names'' and ``user names''.  If a name is ambiguous, all possible deriva-
     tions are returned.

     The following options may be passed to fingerd as server program argu-
     ments in /etc/inetd.conf:

     -s      Enable secure mode.  Queries without a user name are rejected and
             forwarding of queries to other remote hosts is denied.

     -l      Enable logging.  The name of the host originating the query is
             reported via syslog(3) at LOG_NOTICE priority.

     -p      Use an alternate program as the local information provider.  The
             default local program executed by fingerd is finger(1).  By spec-
             ifying a customized local server, this option allows a system
             manager to have more control over what information is provided to
             remote sites.  If -p is specified, fingerd will also set the
             environment variable FINGERD_REMOTE_HOST to the name of the host
             making the request.


SEE ALSO

     finger(1), inetd(8)


HISTORY

     The fingerd utility appeared in 4.3BSD.


BUGS

     Connecting directly to the server from a TIP or an equally narrow-minded
     TELNET-protocol user program can result in meaningless attempts at option
     negotiation being sent to the server, which will foul up the command line
     interpretation.  The fingerd utility should be taught to filter out IAC's
     and perhaps even respond negatively (IAC WON'T) to all option commands
     received.

DragonFly 3.5                    June 4, 1993                    DragonFly 3.5

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