DETECTING INTRUSIONS By Matthew Morrow. WHAT ARE INTRUSIONS? Definition: “To compromise a computer system by breaking the security of such a system or.

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Presentation transcript:

DETECTING INTRUSIONS By Matthew Morrow

WHAT ARE INTRUSIONS? Definition: “To compromise a computer system by breaking the security of such a system or causing it to enter into an insecure state.” Types: Eavesdropping: “Listen in” or interpret the traffic on a network Identity Spoofing: Can create fake IP addresses to gain access to network Denial-Of-Service: Prevents normal use of network Flood network with traffic until shutdown occurs

SOME TERMS Detection Rate: Number of intrusions detected by the system False Alarm Rate: Number of false positives False Positive: No Attack-Alert True Positive: Attack-Alert False Negative: Attack-No Alert True Negative: No Attack-No Alert

INTRUSION DETECTION SYSTEM Also known as IDS The system on the network to detect intrusions Two types of IDS HIDS Deals with individual host computers NIDS Deals with the entire network Placed at strategic points within the network Monitors traffic Usually attached to firewalls Could bottleneck the network

MORE ON NIDS Looks for attack signatures to identify threats Usually a filter is applied to determine what should be discarded or passed on to an attack recognition module Strengths Ownership costs reduced Real time detection and response Independent operating system Evidence removal

SOME IDS PRODUCTS AnaDisk BlackICE Defender Cisco Secure IDS CyberCop Dragon Sensor Forensic Toolkit Klaxon LSOF Sentry Etc.

ANADISK Not free Non-Commercial single-user registration fee of $25 Commercial and multi-system site fee is $150 Examines, edits, and analyzing diskettes Two programs Adinstal: Determines diskette configuration of the computer being used Anadisk.exe: Modifies with the diskette configuration info Manual:

DRAGON SENSOR Watches live network packets for signs of computer crimes Once finding an attack, it sends the pages, , and takes action to stop event and record for future forensic analysis Award winning UNIX based Intrusion Detection System from Enterasys

SNORT Free and open source It is a prevention system and detection system for networks Developed by Sourcefire Real time traffic analysis and packet logging on Ips Demo:

REFERENCES Bradley, CISSP, MCSE2k, MCSA, A, Tony. "Introduction to Intrusion Detection Systems (IDS)." 15 Jan Web. 23 Apr "Intrusion Detection FAQ: What Is Intrusion Detection?" SANS:. Web. 23 Apr "Intrusion Detection System." Wikipedia. Wikimedia Foundation, 1 Feb Web. 14 Apr Mafra, P.m., J.s. Fraga, and A.o. Santin. "Algorithms for a Distributed IDS in MANETs." Journal of Computer and System Sciences (2014). Print. Scarfone, Karen, and Peter Mell. "Guide to Intrusion Detection and Prevention Systems (IDPS)." NIST (2007). Print.