twintro(8) [debian man page]
TWINTRO(8) System Manager's Manual TWINTRO(8) NAME
twintro - introduction to Tripwire software DESCRIPTION
Tripwire 2.4 is a file integrity assessment product for Linux networks. Rather than preventing an intruder or virus from attacking system files, Tripwire detects intrusions when they do occur. By comparing system files and directories against a previously stored "baseline" database, Tripwire finds any additions, deletions, or changes to specified properties. This allows the system administrator to determine the extent of the problem and begin necessary damage control. After Tripwire is installed on a system, the following four commands are used: tripwire(8) is used for most of the basic operations of the software. This includes creation of the Tripwire database, and checking the integrity of the filesystem against that database. twadmin(8) is used to create, encode, and sign Tripwire policy, configuration, and key files, and for various administrative functions. twprint(8) prints Tripwire database and report files in a plain text format. siggen(8) is a file utility that displays hash values for files. In addition to the command references listed above, the following three man pages provide information on important components of the Trip- wire package. twfiles(5) provides an overview of the various files created and used by Tripwire, including default locations and settings. twconfig(4) explains the configuration file, which is used to set system-specific information that affects Tripwire operation. twpolicy(4) explains the policy file, which specifies the files and directories Tripwire should check, and how they should be scanned. Using the --help flag with any Tripwire command (e.g. tripwire --help) will print a short summary of the command modes for that command. If a mode selector is also specified (e.g. tripwire --check --help), a mode-specific usage message will be displayed. Using the all argu- ment with the --help flag (e.g. tripwire --help all) will print detailed usage messages for all modes of the specified command. 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
tripwire(8), twadmin(8), twprint(8), siggen(8), twconfig(4), twpolicy(4), twfiles(5) The Design and Implementation of Tripwire: A UNIX File Integrity CheckerbyGeneKimandEugeneSpafford.PurdueTechnicalReportCSD-TR-93-071. 1 July 2000 TWINTRO(8)
Check Out this Related Man Page
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 2.4.1. 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)