1. IDPS (Intrusion Detection & Prevention System )By
Varang Amin ( )
Guided By
Prof. Richard Sinn

2. Agenda Introduction IDPS Why IDPS Detection Engine Features &Functions
Evaluation
Test Case
Future
Available IDPS in Market

3. Introduction
Secure Environment

4. Introduction Various options are available
IDPS , based on behavior of network and contents of each and every packet.
Firewall , based on Access Control List .
VPN,communication network tunneled through public network.

5. Why IDPS…… Firewall ,based on policy defined in Access Control List
Policy based filtering when session is established
Not able to check each packet in network
Tend to stop search when find any match.
Able to shutdown the connection but not able to throttle the traffic

6. IDPS
Detection method
Specification Detection , based on the application reorganization rules for detecting application and attacks.
Anomaly Detection, based on the behavior of the available pattern in IDPS .
Integrity Check , detection based on hash values and signatures for verify the integrity of data.

7. Architecture of Detection Engine
Fig

8. Deployment IPS
Network Based
Host Based
Hybrid

9. Deployment & Working Principals

10. IDPS Terminology Signatures , basically regular or fixed expression .
Depth Of Search
Offset
Example :
Regular Expressions
eDonkey Login Connection “\xe3.{4}[\x01\xc5] ”

11. Continue………. Fixed Expression Implemented with the help of sniffers.
eDonkey File sharing Connection “
Implemented with the help of sniffers.

12. Continue…. Traffic Anomaly Throttle the network traffic.
Protocol Anomaly
For Standard Service
False Positives
Incorrect application detected .
False Negatives
Application Not Detected

13. Evaluation of IDPS
Generate some manual traffic of open source attacks .
IXIA
Smart bits
Existing service from Windows or Linux OS.

14. Test Case 1
By pass the IPS.

15. Test Case 2
Fragment the Attack

16. Test Case 3
TTL based attacks

17. Future Enhancement …… Can be more sophisticated application
Session Monitoring
Learning
UTM

18. IDPS Example Cisco 6000 Family IDS Snap Gear by Secure Computing
Linux IP Tables (Open Source)
Snort
Intrupro
Sonic Wall Gateway

19. References
Article “IDS Evaluation” published on Network world Magazine .
Insertion, Evasion and Denial Of Service:-Eluding Network Intrusion detection System -Thomas H. Ptacek, Timothy N. Newsham .

20. Thanks
Question ????