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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.

Intrusion Detection: Implementation and Operational Issues  14 July 2002 
Source: CERT - Posted by Nick DeClario   
ID has been an active field of research for about two decades. One of the earliest papers in the field is James Anderson's Computer Security Threat Monitoring and Surveillance published in 1980. Dorothy Denning's seminal paper An Intrusion Detection Model, published in 1987, provided a methodological framework that inspired many researchers and laid the groundwork for commercial products. Despite substantial research and commercial investments, ID technology is immature, and its effectiveness is limited. . .
Crying Wolf: False Alarms Hide Attacks  11 July 2002 
Source: Network World Fusion - Posted by Eric Lubow   
One thing that can be said with certainty about network-based intrusion-detection systems is that they're guaranteed to detect and consume all your available bandwidth. Whether they also detect network intrusions is less of a sure thing. Those are the major conclusions . . .
Use Snort for Lightweight Intrusion Detection  09 July 2002 
Source: - Posted by Eric Lubow   
Designed to fill the gap left by expensive, heavy-duty network intrusion detection systems, Snort is a free, cross-platform packet sniffer, logger, and intrusion detector for monitoring smaller TCP/IP networks. It runs on Linux. . .
Internet Attacks on Companies Up 28 percent, Report Says  09 July 2002 
Source: Computer User - Posted by Eric Lubow   
Internet attacks against public and private organizations around the world leapt 28 percent in the past six months, with most targeting technology, financial services and power companies, according to an industry report due out Monday. . .
Honeynet Project Reverse Challenge Winner Announced  08 July 2002 
Source: Honeynet Project - Posted by Dave Wreski   
The Honeynet Project today announced Dion Mendel as the winner of the Honeynet Reverse Challenge contest. "The Reverse Challenge is an effort to allow incident handlers around the world to all look at the same binary -- a unique tool captured in the wild -- and to see who can dig the most out of the tool and communicate what they've found in a concise manner.. . .
Honeynet Project Releases June Scan of the Month Results  28 June 2002 
Source: Honeynet Project - Posted by Dave Wreski   
This month's challenge is to make sense of a seemingly innocuous flurry of UDP packets. On the evening of Feb 15th, three different members of the Honeynet Research Alliance received a flurry of strange UDP packets, that at first look seemed to have no apparent purpose. This month's Scan of the Month challenge is to understand the purpose of these packets.. . .
What Really Is ‘Forensics’?  20 June 2002 
Source: SC Magazine - Posted by Chris Pallack   
First of all, all attacks are not created equal. There are script kiddie attacks, attacks by serious hackers, by insiders, by fraudsters, and attacks by just about any other malefactor you can imagine who has a bone to pick with his or her intended victim.. . .
LIDS FAQ v0.15  19 June 2002 
Source: - Posted by Dave Wreski   
Version 0.15 of the LIDS FAQ is available. LIDS is an enhancement for the Linux kernel written by Xie Huagang and Philippe Biondi. It implements several security features that are not in the Linux kernel natively. Some of these include: mandatory access controls (MAC), a port scan detector, file protection (even from root), and process protection. . . .
IDS at the Crossroads  07 June 2002 
Source: Information Security - Posted by Dave Wreski   
Four infosec innovators size up new threats and how IDSes are evolving to meet them. Gleichauf, Klaus, Ranum and Roesch are interviewed in this article. Intrusion detection is on the minds of many folks. How are threats evolving today?. . .
June Honeynet Scan of the Month  04 June 2002 
Source: Honeynet Project - Posted by Dave Wreski   
This month's challenge is to make sense of a seemingly innocuous flurry of UDP packets. All submissions are due no later then 22:00 GMT, Friday, 21 June. Results will be released Friday, 28 June. . . .
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