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BSD 2.11 - man page for fingerd (bsd section 8)

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FINGERD(8)									       FINGERD(8)

       fingerd - remote user information server

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

       Fingerd	is  a simple protocol based on RFC1196 that provides an interface to the Name and
       Finger programs at several 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.  There is no required format and the protocol consists mostly of specifying a  sin-
       gle ``command line''.

       Fingerd	listens  for  TCP  requests at port 79.  Once connected it reads a single command
       line terminated by a <CRLF> which is passed to finger(1).  Fingerd closes its  connections
       as soon as the output is finished.

       If  the line is null (i.e. just a <CRLF> is sent) then finger 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 ambigu-
       ous, all possible derivations are returned.

       The   following	options  may  be  passed  to  fingerd  as  server  program  arguments  in

       -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 sys-
	      log(3) at LOG_NOTICE priority.

       -p     Use an alternate program as the local information provider.  The default local pro-
	      gram  executed  by  fingerd is finger(1).  By specifying a customized local server,
	      this option allows a system manager to have more control over what  information  is
	      provided to remote sites.


       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.  Fingerd should be taught to
       filter out IAC's and perhaps even respond negatively (IAC WON'T) to  all  option  commands

       The fingerd command appeared in 4.3BSD.

4.2 Berkeley Distribution		  April 1, 1995 			       FINGERD(8)
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