twconfig - Tripwire configuration file reference
The configuration file stores system-specific information, including the location of Trip-
wire data files, and the settings used to send email notification. The configuration file
settings are generated during the installation process, but can be changed by the system
administrator at any time. The configuration file is signed with the site key, and the
site passphrase is required to edit the file.
During installation, a signed Tripwire configuration file tw.cfg will be created in the
/etc/tripwire directory, and a plain text copy of this configuration file twcfg.txt will
be created in the same directory.
The configuration file is modified using the twadmin --create-cfgfile command. With this
command, the user can designate an existing plain text file as the current configuration
file. Using the current site key and passphrase, the new configuration file is crypto-
graphically signed and saved with this command.
Components of the Configuration File
The Tripwire configuration file is structured as a list of keyword-value pairs, and may
also contain comments and variable definitions. Any lines with "#" in the first column
are treated as comments.
The general syntax for variable definition is:
keyword = value
ROOT = /usr/tripwire
EDITOR = /usr/local/bin/jove
Variable substitution on the right hand side is permitted using the syntax:
$( varname )
DBFILE = $(ROOT)/db/$(HOSTNAME).twd
Variable names are case-sensitive, and may contain all alphanumeric characters, under-
scores, the characters "+-@:", and the period. Two variables are predefined in the con-
figuration file, and may not be changed. HOSTNAME is the unqualified hostname that Trip-
wire is running on, and DATE is a string representation of the date and time.
The following variables must be set in order for Tripwire to operate. The values listed
below are assigned during installation.
POLFILE Default = /etc/tripwire/tw.pol
DBFILE Default = /var/lib/tripwire/$(HOSTNAME).twd
REPORTFILE Default = /var/lib/tripwire/report/$(HOSTNAME)-$(DATE).twr
SITEKEYFILE Default = /etc/tripwire/site.key
LOCALKEYFILE Default = /etc/tripwire/$(HOSTNAME)-local.key
The following variables are not required to run Tripwire, but some of the program's func-
tionality will be lost without them. The values assigned during installation are listed.
EDITOR Specifies an editor to be used in interactive modes. If EDITOR is not defined, and
no editor is specified on the command line, using interactive modes will cause an
Initial value: /bin/vi
This variable can be set to the location to which tripwire should write its tempo-
rary files. By default it is /tmp, which due to the default permissions can be very
insecure. It is recommended that you use this configuration variable to provide
tripwire with a secure place to write temporary files. The directory used should
have its permissions set such that only the owning process can read/write to it,
i.e. "chmod 700".
Initial value: /tmp
This variable is set to a list of email addresses separated by either a comma ",",
or semi-colon ";". If a report would have normally been sent out, it will also be
send to this list of recipients.
Initial value: none
Prompt for passphrase as late as possible to minimize the amount of time that the
passphrase is stored in memory. If the value is true (case-sensitive), then late
prompting is turned on. With any other value, or if the variable is removed from
the configuration file, late prompting is turned off.
Initial value: false
When a file is added or removed from a directory, Tripwire reports both the changes
to the file itself, and the modification to the directory (size, num links, etc.).
This can create redundant entries in Tripwire reports. With loose directory check-
ing, Tripwire will not check directories for any properties that would change when
a file was added or deleted. This includes: size, number of links, access time,
change time, modification time, number of blocks, growing file, and all hashes.
If the value for this variable is true (case-sensitive), then loose directory
checking is turned on, and these properties will be ignored for all directories.
With any other value, or if the variable is removed from the configuration file,
loose directory checking is turned off. Turning loose directory checking on is
equivalent to appending the following propertymask to the rules for all directory
Initial value: false
If this variable is set to true, messages are sent to the syslog for four events:
database initialization, integrity check completions, database updates, and policy
updates. The syslog messages are sent from the "user" facility at the "notice"
level. For more information, see the syslogd(1) man page and the syslog.conf file.
The following illustrates the information logged in the syslog for each of the four
Jun 18 14:09:42 lighthouse tripwire: Database initialized:
Jun 18 14:10:57 lighthouse tripwire: Integrity Check Complete:
TWReport lighthouse 20000618141057 V:2 S:90 A:1 R:0 C:1
Jun 18 14:11:19 lighthouse tripwire: Database Update Complete:
Jun 18 14:18:26 lighthouse tripwire: Policy Update Complete:
The letters in the Integrity Checking log correspond to # of violations, maximum
severity level, and # of files added, deleted, and changed, respectively. With any
value other than true, or if this variable is removed from the configuration file,
syslog reporting will be turned off.
Initial value: true
Specifies the default level of report produced by the twprint --print-report mode.
Valid values for this option are 0 to 4. The report level specified by this option
can be overridden with the (-t or --report-level) option on the command line. If
this variable is not included in the configuration file, the default report level
is 3. Note that only reports printed using the twprint --print-report mode are
affected by this parameter; reports displayed by other modes and other commands are
Initial value: 3
Email Notification Variables
Specifies the protocol to be used by Tripwire for email notification. The only
acceptable values for this field are SMTP or SENDMAIL. Any other value will produce
an error message.
Initial value: SENDMAIL
Specifies the domain name or IP address of the SMTP server used for email notifica-
tion. Ignored unless MAILMETHOD is set to SMTP.
Initial value: mail.domain.com
Specifies the port number used with SMTP. Ignored unless MAILMETHOD is set to SMTP.
Initial value: 25
Specifies the program used for email reporting of rule violations if MAILMETHOD is
set to SENDMAIL. The program must take an RFC822 style mail header, and recipients
will be listed in the "To:" field of the mail header. Some mail programs interpret
a line consisting of only a single period character to mean end-of-input, and all
text after that is ignored. Since there is a small possibility that a Tripwire
report would contain such a line, the mail program specified must be able to ignore
lines that consist of a single period (the -oi option to sendmail produces this
Initial value: /usr/lib/sendmail -oi -t
Specifies the default level of report produced by the tripwire --check mode email
report. Valid values for this option are 0 to 4. The report level specified by
this option can be overridden with the (-t or --email-report-level) option on the
command-line. If this variable is not included in the configuration file, the
default report level is 3.
Initial value: 3
This option controls the way that Tripwire sends email notification if no rule vio-
lations are found during an integrity check. If MAILNOVIOLATIONS is set to false
and no violations are found, Tripwire will not send a report. With any other value,
or if the variable is removed from the configuration file, Tripwire will send an
email message stating that no violations were found.
Mailing reports of no violations allows an administrator to distinguish between
unattended integrity checks that are failing to run and integrity checks that are
running but are not finding any violations. However, mailing no violations reports
will increase the amount of data that must be processed.
Initial value: true
This man page describes Tripwire 2.4.1.
Permission is granted to make and distribute verbatim copies of this man page provided the
copyright notice and this permission notice are preserved on all copies.
Permission is granted to copy and distribute modified versions of this man page under the
conditions for verbatim copying, provided that the entire resulting derived work is dis-
tributed under the terms of a permission notice identical to this one.
Permission is granted to copy and distribute translations of this man page into another
language, under the above conditions for modified versions, except that this permission
notice may be stated in a translation approved by Tripwire, Inc.
Copyright 2000 Tripwire, Inc. Tripwire is a registered trademark of Tripwire, Inc. in the
United States and other countries. All rights reserved.
twintro(8), tripwire(8), twadmin(8), twprint(8), siggen(8), twpolicy(4), twfiles(5), send-
mail(1), vi(1), syslogd(1)
1 July 2000 TWCONFIG(4)