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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.

NIST Special: Intrusion Detection Systems  20 August 2001 
Source: Cryptome - Posted by Dave Wreski   
This document translated from PDF by Cryptome provides a great overview of Intrusion Detection Systems. Intrusion detection is the process of monitoring the events occurring in a computer system or network and analyzing them for signs of intrusions, defined as attempts . . .
Dragon Claws its Way to the Top  16 August 2001 
Source: Network Computing - Posted by Dave Wreski   
This is a great (and lengthy) comparision of commercially available and freely available network intrusion detection devices. "To get a handle on the state of the IDS market, we decided to go back to school. Literally. We made the trip from our Neohapsis labs over to DePaul University in Chicago. There we set up the IDSnet and put 10 IDS products to the test . . .
Snort 1.8.1 Now Available  15 August 2001 
Source: - Posted by Dave Wreski   
This latest release includes SNMP alerting support, greatly improved stability, IDMEF XML alert support, new decoder for "%u encoded" HTTP traffic, limited wildcards/regex in the rules language, plus a new page.. . .
Honeypot for hackers  14 August 2001 
Source: Lexis-Nexis - Posted by Nick DeClario   
COMPUTER experts can now predict when a malicious hacker is about to strike, and sound the alarm days in advance. They are urging companies to use their technique to stop hackers getting into networks. "Regardless of who you are, you . . .
New virus travels in PDF files  08 August 2001 
Source: CNET - Posted by Dave Wreski   
Adobe's popular PDF file format--known to anyone who's ever called up a tax form on the IRS Web site--has generally been considered immune to viruses. But a new virus carried by programs embedded in PDF files raises concerns that the format . . .
Installing and running Tripwire  05 August 2001 
Source: Help Net Security - Posted by Chris Pallack   
The following article deals with a little software package known as Tripwire, available for Linux as well as for other Unix variants and Windows. Only the Linux version is open source though, others are commercial. Tripwire is easily described as a . . .
Hackers to the honey  01 August 2001 
Source: BBC - Posted by Benjamin D. Thomas   
A decoy computer network set up to record every attempt to crack it open and subvert it has revealed just how active and determined malicious hackers have become. Statistics gathered by the network show that computers connected to the web are . . .
SANS Security Alert. Code Red Is Set to Come Storming Back!  30 July 2001 
Source: SANS - Posted by Dave Wreski   
For those of you with networks to manage... "The Code Red Worm and mutations of the worm pose a continued and serious threat to Internet users. Immediate action is required to combat this threat. Users who have deployed software that is vulnerable to the worm (Microsoft IIS Versions 4.0 and 5.0) must install, if they have not done so already, a vital security patch.". . .
Know Your Enemy: Statistics  25 July 2001 
Source: Honeynet Project - Posted by Dave Wreski   
Over the past several years, the Honeynet Project has been collecting and archiving information on blackhat activity. We have attempted, to the best of our ability, to log and capture every probe, attack, and exploit made against our Honeynet. This raw data has the potential for great value. We decided to share this data with the security community and demonstrate its value. We will focus on two areas. First, we intend to demonstrate how aggressive the blackhat community can be. Regardless of who you are, you are not safe.. . .
Code Red IIS Worm Information  19 July 2001 
Source: Marc Maiffret / LinuxSecurity - Posted by Dave Wreski   
Microsoft IIS Web servers are being infected by the "Code Red" and apparently causing some pretty serious damage, reportedly including "" as one of its targets. Below is a great description of the potential this worm has, and its impact on the Internet.. . .
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