.TH CFINGERD 8 "18 Dec 1998" "cfingerd 1.4.2" "Configurable Finger Daemon"
.SH NAME
cfingerd \- Configurable finger daemon.
.br
.SH SYNOPSIS
.B cfingerd
.RB [\ \-c\ |\ \-e\ |\ \-o\ |\ \-v\ ]
           \-c : Check configuration
           \-e : Emulate local finger w/o inetd
           \-o : Turn off all finger queries
           \-v : Request version information
.br
.sp
\-c checks your installed configuration.  This makes sure there are no 
existing errors in the current
.I cfingerd.conf
file.
.PP
\-e allows you to emulate a local finger on a user that exists on your 
system.  This lets you test cfingerd on your system 
before installing it.  Using the "\-e" directive is the same as 
installing the software, typing "finger username@" and getting the 
output.  Using "\-e username" does the same.
.PP
\-o turns off all finger queries.  This makes it so that no one can
finger your system \- no matter what they try to do.  Unlike the other
options, this option is used in inetd.conf, not on the command line.
.PP
\-v requests cfingerd version information.
.br
.SH DESCRIPTION
.B CFINGERD
is a totally new, and totally configurable finger daemon \- 
one of the first.  It listenes on the finger port (port 79) to provide 
useful information about each user that is on your system according to
the finger protocol as described in RFC 1288.  Only thing is, cfingerd
provides a unique twist.
.PP
.B CFINGERD
was designed for the sole purpose of making output on finger queries 
configurable.  If you want to change any text that is displayed during 
finger queries, you can configure the finger daemon to display just about 
anything you want.
.PP
.B CFINGERD
also takes into account any security breaches, and attempts to close 
them.  With the added bonus of creating ".nofinger" files, this is 
displayed instead of finger information, making it possible for users to 
keep themselves relatively anonymous from outside users.  For a
maximum of users privacy you should place an exact copy of
.I /etc/cfingerd/nouser_banner.txt
in your
.I .nofinger
file.
.br
.SH "WHY WAS IT DONE?"
The answer is simple.  Security.  Many sites turn off finger for the 
reason that they don't want outside users to see who's on their system, 
or get information about a specific user on their system.  This seemed 
unfair to the rest of the users out there, so this program was created.  
Besides, those sites were waiting for this type of program.  Many sites 
that originally had their finger turned off turned them back on because 
of cfingerd.
.PP
Many sites have complained that they wanted the ability to create a 
"fake\-user", or a user that doesn't exist but calls a pre\-written shell 
script.  
.B CFINGERD
has taken this into account, and provides the best method possible for 
creating such scripts.  (See cfingerd.conf(5) for more information on the 
configuration file.)
.br
.SH "FEATURES CFINGERD PROVIDES, AND DESCRIPTIONS OF EACH"
.B CFINGERD 
was totally rewritten.  Why is this?  Well, the older version of cfingerd 
had quite a few bugs, and it didn't quite do all of the things that 
cfingerd now does.  This new version was totally revamped, and most of 
the bugs that were in the older version of cfingerd were removed in this 
one.  Besides, the code in here was more compact.
.PP
.B Header and footer displays
were a very big part of the original release of cfingerd, and
shall continue to remain in all versions.  Headers and footers are only
displays at the beginning and ending of all finger displays, and are used
as unique little "advertisements" or such.
.PP
.B Last time displayed
is always a critical issue.  It's covered in cfingerd.  Cfingerd simply shows
how many times this user is connected, what their idle time is on each TTY
they're connected to, and whether or not they are accepting messages.  If
they're not accepting messages, a "[MESG-N]" display will be shown if this
is the case.  This display also shows the last time mail was read, and
whether or not this user has mail.  If this is still too much for your
taste, each of these items can be disabled system wide.
.PP
.B Stand-alone and INETD support
is compiled into the program, but only INETD support is given for the time
being.  The reason being is that I have not yet added the code for
stand-alone daemon mode.
.PP
.B .nofinger files
are used when a user wishes to remain anonymous.  These files should be 
placed in their home directories, and can display anything they want.  
There's just a few restrictions.  These
.IR .nofinger
display files cannot 
be character devices, directories, fifos, soft or hard links, or anything 
else of that caliber.  They must only be normal files.
.PP
.B Fakeusers 
were supported for the simple fact that many sites want
to create users that don't exist, and make them execute a shell.  If you
want this done, then install a fake user.  Read up in
.BR cfingerd.conf (5)
for more information on these useful options.
.PP
.B Service listings
were used to show what fakeusers you have installed on your system.  
These can be formatted however you wish, and are explained (once again) in
.BR cfingerd.conf (5).
.PP
.B Searching for usernames
is a very powerful feature that
.B cfingerd
takes full advantage of.  If you 
are looking for a specific username on the system, or don't know what 
their name is, simply use the
.RB " search.pattern "
directive with
.B cfingerd
will search for all users containing pattern in their real name or
username on that system.
.PP
Searching for usernames is NOT case sensitive.  You may search for
a specific username or real name, for part of the username or real
ame,
or for a pattern matching the entire username or the entire real
ame.
If you search for part of a user's name, chances are,
it'll be displayed.
.PP
.B Warning
searching will currently return the names of daemon users and users



and you will be able to search for a user on your system.
.PP
.B Security
is a given.  If you don't want to show someone something, then it won't
display what you don't want.  Simply edit the cfingerd.conf file and make
changes.  It's that simple.
.PP
Searching for usernames is NOT case sensitive.  If you are searching for 
a specific username, or part of the user's name.  If you search for part 
of a user's name or username, chances are, it'll be displayed.
.PP
.B Not just PLAN, or PROJECT
but there's also an option to display your public PGP key, if you have 
one.  This is very useful if you want to keep your mail or other 
information secret to yourself, and don't want "big brother" watching 
over your shoulder as you talk amongst yourselves.  (Thanks to Andy Smith 
for this patch).  (For your info, the standard plan file is 
.IR .plan , 
project is 
.IR .project ,
PGP info is 
.IR .pgpkey ,
and XFace icon information is
.IR .xface )
.PP
Remember, any or all of these options stated above, can be turned on or 
off at will.  If you want a specific option turned off, turn it off.  :) 
.br
.SH "FULL LIST OF BUILTIN USER NAMES"

.B cfingerd
provides a set of builtin fake users.  Two of them are also used
internally by
.BR cfingerd .
.PP
.TP
.B @
List logged on users without
.I .nofinger
file.  If the
.B system_list_sites
option is used in the main configuration file
.B cfingerd
will try to gather information from all listed hosts.
.TP
.B userlist@
Same as
.BR @ ,
except that it only lists people who are idle no longer than one day.
This is intended to give a better overview of who's really online at
the moment of fingering.
.TP
.B userlist-only@
List logged on users without
.I .nofinger
file - without headers and footers.  This fake user is used internally
to gather system information from remote hosts for
.BR @ .
.TP
.B userlist-online@
List logged on users without
.I .nofinger
file - without headers and footers.  Only users will be listed who are
idle no longer than a day.  This fake user is used internally
to gather system information from remote hosts for
.BR userlist@ .
.TP
.B version@
Display version information for
.BR cfingerd .
.TP
.B services@
List all fake users.
.TP
.B search.pattern@
Search for users using the GCOS field in
.IR /etc/passwd .
Only users will be displayed who don't have a
.IR .nofinger -file.
.TP
.B help@
Help text listing all of these.
.PP
These can be disabled in cfingerd.conf(5) as follows
.TP
.BR @ " and " userlist@
Set SYSTEM_LIST to FALSE.
.TP
.BR userlist-only@ " and " userlist-online@
Disable ALLOW_USERLIST_ONLY (i.e. prefix it with a minus sign) or
disable SYSTEM_LIST.
.TP
.B version@
Disable ALLOW_CONFESSION (i.e. prefix it with a minus sign).
.TP
.B  services@
Disable ALLOW_FAKEUSER_FINGER (i.e. prefix it with a minus sign).
.TP
.B search.pattern@
Disable ALLOW_SEARCHABLE_FINGER (i.e. prefix it with a minus sign).
.TP
.B help@
Disable ALLOW_CONFESSION (i.e. prefix it with a minus sign).

.SH "ERROR MESSAGES"
Any error messages that result are fairly easy to debug if you know what 
to look for.
.PP
.B Segmentation Violations
don't always occur, but if they ever do, you can pretty easily figure out 
what's going on.  Unfortunately,
.B cfingerd
doesn't have any compatibility with older
.I cfingerd.conf
files, so if you get a Segmentation Violation, 
this (usually) means that your
.I cfingerd.conf
file needs to be replaced.
.PP
.B Timeouts
usually mean that a script has timed out, or a connection to another site 
timed out.
.br
.SH "SYSLOGGING MESSAGES"
Well, there's no real way to describe SYSLOG
messages since they can be changed as the system administrator chooses. 
Although, examples can be given based on the standard configuration that
was distributed.
.PP
If any IP addresses cannot be matched to a name it will display a "IP: 
Hostname not matched".
.PP
If the renice fails (to make the program run at the highest priority) 
then it will display "Fatal - Nice died: (reason)".
.PP
If there is no buffer information waiting in the STDIN buffer, it will 
display "STDIN contains no data".
.PP
If a trusted host fingers your site, a "<- Trusted" will appear.
.PP
If a rejected host fingers your site, a "<- Rejected" will appear.
.PP
If root is fingered on your site, it will display "Root".
.PP
If a service listing was fingered on your site, it will display "Service 
listing".
.PP
If a user listing was requested, it will display "User listing".
.PP
If a fake user was requested, it will display "Fake user".
.PP
If "whois" data was requested, it will display "Whois request".  (Note, 
whois was not implemented in this release, since it wasn't 'RFC' 
compliant.)
.PP
Any extra information pertaining to the incoming finger is displayed in 
the syslogging area.  (It's also recommended that you reconfigure 
.BR syslog.conf (5)
to display to an unused VT.  :)
.br
.\" .SH BUGS
.\" On ELF-specific systems, services usually lists a bit of garbage at 
.\" the beginning of the finger display.  This doesn't appear to be a problem 
.\" on a.out systems, so if you have ELF, you may want to compile cfingerd as 
.\" a.out if this becomes a problem.
.\" .br
.SH PLANS
Any other options or improvements will probably come from user 
suggestions.  :)
.PP
Later plans will make it so that you can define your own display formats 
for the finger display.  This means that you can re\-define how you want 
your finger display to look.
.br
.SH CONTACTING
If you like the software, and you want to learn more about the software, 
or want to see a feature added to it that isn't already here, then please 
write to cfingerd@infodrom.north.de.  The project's webpage is at
http://www.infodrom.north.de/cfingerd/ .
.PP
.SH "SEE ALSO"
.BR cfingerd.conf (5),
.BR cfingerd.text (5),
.BR finger (1),
.BR userlist (1),
.BR syslog.conf (5).