09-07-2007
This is strongly discouraged as you will end up sending root password in clear over the network.
The alternative approach is to telnet as a normal user then use "su" to get to root.
However even that is frowned on and ssh should be used instead of telnet.
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FINGERD(8) BSD 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 RFC1196 that provides 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
format 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 launchd(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
derivations are returned.
The following options may be passed to fingerd as server program arguments in /System/Library/LaunchDaemons/finger.plist:
-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 specify-
ing 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), launchd(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.
BSD
June 4, 1993 BSD