This ppt contains brief info about TRIPWIRE an IDS.

1. Tripwire
An opensource
IDS
A File System Integrity Checker for Intrusion
Detection

2. What is Tripwire?
 Reliable intrusion detection system.
 Tool that checks to see what changes
have been made in your system.
 Pinpoints, notifies, determines the
nature, and provides information on
the changes on how to manage the
change.
 Mainly monitors the key attributes(like
binary signature, size and other
related data) of your files.

3.  Changes are compared to the
established good baseline.
 Security is compromised, if there is no
control over the various operations
taking place.
 Security not only means protecting
your system against various attacks
but also means taking quick and
decisive actions when your system is
attacked.

4. How does Tripwire Works?

5.  First, a baseline database is created
storing the original attributes like
binary values in registry.
 If the host computer is intruded, the
intruder changes these values to go
undetected.
 The TripWire software constantly
checks the systemlogs to check if any
unauthorized changes were made.
 If so, then it reports to the user.
 User can then undo those changes to
revert the system back to the original
state.

6. Where is Tripwire Used
? Tripwire for Servers(TS) is software used by
servers.
 Can be installed on any server that needs to be
monitored for any changes.
 Typical servers include mail servers, web
servers, firewalls, transaction server,
development server.
 It is used for network devices like routers,
switches, firewall, etc.
 If any of these devices are tampered with, it
can lead to huge losses for the Organization
that supports the network.

7. Tripwire for Network Devices
 Tripwire for network devices maintains a
log of all significant actions including
adding and deleting nodes, rules, tasks
and user accounts.
 Automatic notification of changes to your
routers, switches and firewalls.
 Automatic restoration of critical network
devices.
 Heterogeneous support for today’s most
commonly used network devices.

8. User Authentication Levels
 “Monitors” are allowed only to monitor
the application. They cannot make
changes to Tripwire for Network Devices
or to the devices that the software
monitors.
 “Users” can make changes to Tripwire
for Network Devices, such as add
routers, switches, groups, tasks etc. but
they cannot make changes to the
devices it monitors
 “Power users” can make changes to the
software and to the devices it monitors.
 “Administrator” can perform all actions,
plus delete violations and log messages

9. There are two types of Tripwire Manager
 Active Tripwire Manager
 Passive Tripwire Manager
 This active Tripwire Manager gives a
user the ability to update the database,
schedule integrity checks, update and
distribute policy and configuration files
and view integrity reports.
 The passive mode only allows to view
the status of the machines and integrity
reports.

10. How to install and use
Tripwire
Installing Tripwire
Initialize the Tripwire database
Testing Tripwire
Report Files
Schedule Check using cron
Set up Email notifications

11. What is the benefit of
Tripwire?
 Increase security: - Immediately detects and
pinpoints unauthorized change.
 Instill Accountability :- Tripwire identifies and
reports the sources of change.
 Gain Visibility:- Tripwire software provides a
centralized view of changes across the
enterprise infrastructure and supports
multiple devices from multiple vendors
 Ensure Availability:- Tripwire software
reduces troubleshooting time, enabling rapid
discovery and recovery. Enables the fastest
possible restoration back to a desired, good
state

12. Drawbacks
 Ineffective when applied to frequently
changing files.
 Higher learning curve to install, edit,
and maintain the software.
 Cost Effective

13. Applications
 Tripwire for Servers(used as
software).
 Tripwire for Host Based Intrusion
Detection System(HIDS) and also for
Network Based Intrusion Detection
System (NIDS).
 Tripwire for Network Devices like
Routers, Switches etc.

14. References
 Gene H. Kim and Eugene H. Spafford, 1994.
Experiences with Tripwire: Using Integrity checkers for
Intrusion Detection, Purdue Technical Report CSD-TR-
93-071, Coast Laboratory, Department of Computer
Sciences, Purdue University.
 Gene H. Kim and Eugene H. Spafford, 1994.Design and
Implementation of Tripwire: A file system integrity
checker, Purdue Technical Report CSD-TR-93-071,
Coast Laboratory, Department of Computer Sciences,
Purdue University.
 Tripwire
 http://www.tripwire.com

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