NAME¶
tigercron - Cron utility for Tiger UNIX Security Checker
SYNOPSIS¶
tigercron [
controlfile] [
-B basedir]
[
tigeroptions...]
DESCRIPTION¶
Tigercron is used to run periodically checks from the Tiger UNIX Security
Checker.
Tigercron reads a control file which is usually located in
'/etc/tiger/cronrc' although it can also be specificied as the first argument
when calling the program. The format of this control file is the same as for
the
cron program, each line indicates when different checks from
Tiger will be run. The user can indicate where Tiger is installed
through the
-B basedir parameter, any other additional options provided
in the command line will be passed on to configure to configure
Tiger
based on them (as described in
tiger (8)).
Tigercron runs the specified checks and compares their reports with
previous stored reports (under /var/log/tiger). It will then mail the user
defined in '/etc/tiger/tigerrc' (
Tiger_Mail_RCPT) the results.
When a module is run,
tigercron checks:
- •
- If Tiger_Cron_Template is set to Y in tigerrc. If it
is, it checks if there is a template stating which are the expected
results.
- •
- If Tiger_Cron_CheckPrev is set to Y in tigerrc. If
it is, it checks if there is a previous run of the module it can check
against.
A differential report is generated depending on the module reports and previous
run and is sent through e-mail. These reports provide an easy way to detect
intrusions even if no configuration of templates has been done. In the event
of an intrusion a
Tiger check might detect something specific (file
changes, new processes, new users, etc.) and this alert mechanism provides a
way to turn
Tiger into a Host Intrusion Detection System (HIDS).
The ability of it to work as a proper HIDS is based on a good customization of
the cronrc file. Modules that check events to which the host is most exposed
to should be run often in order to detect deviations from normal behaviour.
OPTIONS¶
Tigercron uses the same options as
Tiger. A controlfile can be
defined also to override the default.
FILES¶
- /etc/tiger/tigerrc
- Configuration file for the Tiger tool.
- /etc/tiger/cronrc
- Configuration file for the Tigercron tool.
- /var/log/tiger
- Location of the log messages generated by Tiger when
run through cron
- /var/lib/tiger/work
- Working directory used by Tiger scripts to create
temporary files.
SEE ALSO¶
tigexp(8),
tiger(8),
cron(8),
crontab(5)
The deficiencies of using
tigercron as a HIDS are described in the file
README.hostids which is provided with the package. In Debian GNU/Linux you
will find this (and other related) documentation at /usr/share/doc/tiger/
BUGS¶
Currently
Tigercron has only one alert mechanism (mail) and signatures
are not supported. Thus, alerts could be faked. Also, it is dependant on
cron and will not work if
cron is not working.
AUTHOR¶
This manpage was written by Javier Fernandez-Sanguino.
