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Software Architecture

Intrusion Detection System Marc Nemati April 19, 2011. Software Architecture. Intrusion Detection. Port Scan Detection Many attacks begin with locating an open port to launch the attack (Port Scan) Many algorithms and methods to determine if a port is open. Project Overview.

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Software Architecture

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  1. Intrusion Detection System Marc Nemati April 19, 2011 Software Architecture

  2. Intrusion Detection • Port Scan Detection • Many attacks begin with locating an open port to launch the attack (Port Scan) • Many algorithms and methods to determine if a port is open

  3. Project Overview • Check at any given time, if any system on a network is being port scanned • Once a port scan is detected, return the following crucial information to the network admin • IP address • MAC address • Ports Scanned • Duration of Scan

  4. Functionality • Display the Source MAC and IP addresses • Check the type of transport protocol used by looking at the protocol field of the IP packet. • If it a TCP or UDP packet extract and display the source and destination port numbers. • Specifically recognize all of the following attacks; • TCP SYN scan • UDP port scan • IP protocol scan • TCP Maimon scan • TCP FIN, and Null scan • When a scan is detected, display the number of ports scanned, originating IP address, destination IP, and list all the destination port addresses.

  5. Design 1 – Object Oriented

  6. Design 1 – Level 2 Main isTCP_SYN_attack() getDeviceList() PortScanDetector isTCP_FIN_attack() PacketHandler isTCP_Maimon_attack() run() isIPproto_attack() detect() receivePacket() isUDP_attack() Packet_list

  7. Design 1 – Class Diagram

  8. Design 1 - Mapping

  9. Design 2 – Client/Server

  10. Design 2 – Level 2 Main Network isTCP_SYN_attack() getDeviceList() PortScanDetector isTCP_FIN_attack() PacketHandler isTCP_Maimon_attack() run() isIPproto_attack() receivePacket() detect() isUDP_attack() sendPacket() Packet_list

  11. Design 2 – Class Diagram

  12. Design 2 - Mapping

  13. Pros and Cons Object - Oriented Client/Server

  14. Rational For Implementation • Object Oriented • Java • Cross Platform (Windows/Linux) • Threading • Used due to Large number of packets on the network • Efficiency • Memory Management • Reduces Network Overhead

  15. Compilation

  16. Screen Shots

  17. Screen Shot - SYN

  18. Screen Shot - FIN

  19. Screen Shot - Maimon

  20. Screen Shot - UDP

  21. Screen Shot - IP

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