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Intrusion Detection
We have thousands of posts on a wide variety of open source and security topics, conveniently organized for searching or just browsing.

UC San Diego Researchers Analyze Prevalence, Patterns of Worldwide Denial-of-Service Attacks on Inte  22 May 2001 
Source: Symantec - Posted by Ryan W. Maple   
Using a new technique, University of California, San Diego network researchers from the San Diego Supercomputer Center [SDSC] and the Jacobs School of Engineering have analyzed the worldwide pattern of malicious denial-of-service [DoS] attacks against the computers of . . .
Intrusion-Detection Systems by the Numbers  21 May 2001 
Source: ComputerWorld - Posted by Dave Wreski   
My company recently tested and acquired a network-based intrusion-detection system (IDS). Over the past few months, I've received many e-mails from readers asking me to explain the performance-testing methodology I used, so I've decided to share how I tested our network-based IDS.. . .
Sniffing Out Packet Sniffers  15 May 2001 
Source: Earthweb - Posted by Dave Wreski   
One of the oldest methods of stealing information off of a network is through packet sniffing. In case you aren't familiar with the term, packet sniffing refers to the technique of copying each packet as it flows across the network. While . . .
Linux "0wn this box" Challenge  01 May 2001 
Source: Cylant Technologies - Posted by Dave Wreski   
Cylant Technology announces its "0wn this box" challenge. As a demonstration of its behavioral analysis approach to the field of security, Cylant invites hackers and crackers alike to attempt a root compromise of The first person to successfully "0wn" victim will have the server shipped to them. . . .
Digital detectives track hacks  25 April 2001 
Source: ZDNet / eWeek - Posted by Nick DeClario   
If e-business had a modern-day Sherlock Holmes, his name would be David Dittrich. Dittrich, a security manager at the University of Washington, in Seattle, is one of a rare breed of security pros-the computer forensics expert-whose skills are getting ever more . . .
Scanning Your Network  23 April 2001 
Source: O'Reilly / OnLamp - Posted by Nick DeClario   
This document covers examining ICMP packets, IP packets revealed, Capturing TCP Packets, TCP Protocol Layers, and Understanding Filesystem Inodes on a FreeBSD system. "In the next few articles, I'd like to demonstrate putting some of this knowledge together in order to . . .
Virtual Burglar Alarm - Intrusion Detection Systems (Part 1)  22 April 2001 
Source: Thomas Biege - Posted by Dave Wreski   
Simply put, intrusion detection systems (ID systems) are virtual burglar alarms. ID systems automatically recognize attacks on network security and computer systems. Specifically, ID systems monitor compliance with security policies. An IDS collects current state data from one or . . .
E-business - A Matter of Conviction  20 April 2001 
Source: Symantec - Posted by Jen Olson   
UK companies are so intent on getting their e-commerce sites back online after a security breach that they risk tampering with the scene of a crime and ruining any chance of prosecution. The main concern of any company suffering a hack attack should be to identify the source of the breach and determine whether it is an internal or external problem, according to KPMG's 2001 global e-fraud survey.. . .
Intrusion Detection  18 April 2001 
Source: IT World - Posted by Jen Olson   
Definition -- Intrusion detection is the art and science of sensing when a system or network is being used inappropriately or without authorization. An intrusion-detection system (IDS) monitors system and network resources and activities and, using information gathered from these sources, . . .
Forensics 'DUST' For Cyberprints  13 April 2001 
Source: Lexis-Nexis - Posted by Ryan W. Maple   
David Brown reports on advances in forensic science that can catch hackers by their behaviour Experts in forensic computing believe that businesses can help to identify the "signature" techniques of hackers, by monitoring how they behave inside networks, and which . . .
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