10-10-2001
Security! Yay!
http://www.linuxnewbie.org/nhf/intel...ity/index.html
I recommend the "Securing you Home Maching" section first. It won't cover you 100%, but it's a good start for new-comers to the Unix world. Check out the rest of the site as well, and when you get a little more comfortable with your newfound Unix skills, don't be afraid to check out
www.linuxdoc.org.
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ftpshut(1) General Commands Manual ftpshut(1)
NAME
ftpshut - create shutdown message file to shut down the ftp servers at a given time
SYNOPSIS
time [ warning-message ... ]
DESCRIPTION
The command provides an automated shutdown procedure that a superuser can use to notify ftp users when the ftp server is shutting down.
This command will create a shutdown message file in the path specified by the 'shutdown' directive in the file in the real, anonymous and
virtual user accounts. For guest accounts the system administrator must copy the message file created in the real user account to the
guest accounts manually. The server will check this file regularly to see if the server is going to be shut down.
This option causes the program to display copyright and version information,
then terminate.
This option is used as deny_offset. New FTP access is disabled 'min' minutes before
shutdown. The default value of 'min' is 10 minutes. This value can be reset by the user.
This option is used as disc_offset. All current FTP connections will be dropped 'min'
minutes before shutdown. The default value of 'min' is 5 minutes. This value can be reset by the user.
time time, is the time at which the ftp server will be shutdown. If is set to the word `now' the shutdown will be immedi-
ate. time can also be set to a future time. Future time can be specified in one of the two formats: + number or
HHMM. The first format brings the ftp servers down in number minutes. The second format brings the ftp servers down
at the time of day indicated, using a 24-hour clock format.
warning-message
The warning-message is the message the server will flash to its clients on shut down. The user can use a message of
his choice or use the 'macros' or 'magic cookies' that are available. The server will replace the macro with the
specified text string. The warning-message will be formatted to be 75 characters long, including the length of any
expanded macros ("magic cookies"). The default warning message is "System shutdown at %s". The following magic cook-
ies are available:
%s time system is going to shut down
%r time new connections will be denied
%d time current connections will be dropped
%C current working directory
%E the maintainer's email address as defined in ftpaccess
%L local host name
%M maximum allowed number of users in this class
%N current number of users in this class
%R remote host name
%T local time (form Thu Nov 15 17:12:42 1990)
%U username given at login time
WARNINGS
You can kill the servers only between now and 23:59, if you use the absolute time for
EXIT STATUS
returns:
0 successful
1 failure
-1 the wrong parameter was passed to
AUTHOR
was developed by the Washington University, St. Louis, Missouri.
SEE ALSO
ftpaccess(4)
ftpshut(1)