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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.

Aide 0.9 Released  04 June 2002 
Source: Aide Project - Posted by Dave Wreski   
AIDE (Advanced Intrusion Detection Environment) is a free replacement for Tripwire. It does the same things as the semi-free Tripwire and more. There are other free replacements available so why build a new one? All the other replacements do not achieve the level of Tripwire. And I wanted a program that would exceed the limitations of Tripwire.. . .
Intrusion Detection: Running a Hacker Simulation  30 May 2002 
Source: NewsFactor - Posted by Dave Wreski   
The most common type of hacker simulation is a remote scan of a company's network, which gives the target company an idea of what its networks look like to a hacker on the Internet. The cost of worldwide intellectual property theft, much of which occurs as a result of corporate espionage conducted through the Internet, may be as high as US$300 billion per year, according to industry watchers.. . .
Beyond intrusion detection  30 May 2002 
Source: vnunet - Posted by Pete O'Hara   
Making sense of security software event logs, whether it's from your firewall or an expensive intrusion detection system, can be like trying to drink from a fire hose. Even when you find a real problem, what do you do? But intrusion . . .
Intrusion-detection net revived  28 May 2002 
Source: FCW - Posted by Jen Olson   
The General Services Administration and Carnegie Mellon University this fall will start testing a new technology to analyze and report on patterns in the cyber intrusion information gathered across government, an idea that was first floated and eventually sunk two years . . .
PortSentry for Attack Detection, Part One  16 May 2002 
Source: Securityfocus - Posted by Jen Olson   
Portsentry by Psionic Technologies is a component of their TriSentry suite of attack detection tools: portsentry, hostsentry, and logsentry. This article is the first of a two-part series that will describe in detail how Portsentry works from both a theoretical and a technical point of view.The second article will discuss installing, configuring, and tailoring PortSentry for individual systems.. . .
Security experts swarm to Honeynet challenge  09 May 2002 
Source: VNUNet - Posted by Benjamin D. Thomas   
Reverse engineering project to unravel binary caught in the wild The Honeynet Project, which has been monitoring black hat hacking activity over the past year, has set up a new challenge to help develop reverse engineering skills throughout the security community. . . .
New Way to Nab Hackers  07 May 2002 
Source: eWeek - Posted by Pete O'Hara   
As the threats to corporate networks continue to mount and attackers' methods evolve, security vendors are turning to technologies that detect not just what attackers are doing but how they're doing it. ... The thing to realize about anomaly detection is that it assumes anything 'unusual' is wrong. So that means that the majority of behavior must be 'usual' and predictable," said Gene Spafford, a professor of computer science at Purdue University. . .
Honeynet Project: The Reverse Challenge  02 May 2002 
Source: Honeynet Project - Posted by Dave Wreski   
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 that system and communicate what they've found in a concise manner.. . .
How to install PureSecure, the painless IDS  01 May 2002 
Source: LinuxWorld - Posted by Jen Olson   
There are more differences between ACID and PureSecure than just the license. PureSecure is much more polished, more complete, and more full-featured than its free software counterpart. The first major difference I noticed between PureSecure and ACID was the installation. The . . .
Network Forensics: Tapping the Internet  29 April 2002 
Source: O'Reilly Network - Posted by Dave Wreski   
Methods of archiving network data for forensic analysis. "Another approach to monitoring is to examine all of the traffic that moves over the network, but only record information deemed worthy of further analysis. The primary advantage of this approach is that computers can monitor far more information than they can archive -- memory is faster than disk.. . .
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