TWFILES(5)							File Formats Manual							TWFILES(5)

NAME

       twfiles - overview of files used by Tripwire and file backup process

DESCRIPTION

   Configuration File
       default: /etc/tripwire/tw.cfg
       The configuration file stores system-specific information, such as the location of Tripwire data files. The configuration settings are gen-
       erated during the installation process, but can be changed by the system administrator at any time.  See the twconfig(4) man page for a
       more complete discussion.

   Policy File
       default: /etc/tripwire/tw.pol
       The policy file consists of a series of rules specifying the system objects that Tripwire should monitor, and the data for each object that
       should be collected and stored in the database file.  Should unexpected changes occur, the policy file can describe the person to be noti-
       fied and the severity of the violation.	See the policyguide.txt file in the policy directory and the twpolicy(4) man page for a more com-
       plete discussion.

   Database File
       default: /var/lib/$(HOSTNAME).twd
       The database file serves as the baseline for integrity checking.  After installation, Tripwire creates the initial database file, a "snap-
       shot" of the filesystem in a known secure state.  Later, when an integrity check is run, Tripwire compares each system object described in
       the policy file against its corresponding entry in the database.  A report is created, and if an object has changed outside of constraints
       defined in the policy file, a violation is reported.  See the tripwire(8) and twprint(8) man pages for more information on creating and
       maintaining database files.

   Report Files
       default: /var/lib/tripwire/report/$(HOSTNAME)-$(DATE).twr
       Once the above three files have been created, Tripwire can run an integrity check and search for any differences between the current system
       and the data stored in the "baseline" Tripwire database.  This information is archived into report files, a collection of rule violations
       discovered during an integrity check.  With the appropriate settings, a report can also be emailed to one or more recipients.  See the
       tripwire(8) and twprint(8) man pages for information on creating and printing report files.

   Key Files
       defaults: /etc/tripwire/site.key and /etc/tripwire/$(HOSTNAME)-local.key
       It is critical that Tripwire files be protected from unauthorized access--an attacker who is able to modify these files can subvert Trip-
       wire operation.	For this reason, all of the above files are signed using public key cryptography to prevent unauthorized modification.
       Two separate sets of keys protect critical Tripwire data files.	One or both of these key sets is necessary for performing almost every
       Tripwire task.

       The site key is used to protect files that could be used across several systems.  This includes the policy and configuration files.  The
       local key is used to protect files specific to the local machine, such as the Tripwire database.  The local key may also be used for sign-
       ing integrity check reports.  See the twadmin(8) man page for more information on keys.

   File Backup
       To prevent the accidental deletion of important data, Tripwire automatically creates backup files whenever any Tripwire file is overwrit-
       ten. The existing file will be renamed with a .bak extension, and the new version of the file will take its place.  Only one backup copy
       for each filename can exist at any time.  If a backup copy of a file already exists, the older backup file will be deleted and replaced
       with the newer one.

       File backup is an integral part of Tripwire, and cannot be removed or changed.

VERSION INFORMATION

       This man page describes Tripwire 2.4.

AUTHORS

       Tripwire, Inc.

COPYING PERMISSIONS

       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 distributed 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.

SEE ALSO

       twintro(8), tripwire(8), twadmin(8), twprint(8), siggen(8), twconfig(4), twpolicy(4)

								    1 July 2000 							TWFILES(5)