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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.

Stopping Internet 'zombies' in their tracks  14 March 2001 
Source: Boston Globe - Posted by Nick DeClario   
A couple of Boston-area companies think they've found a way to control a common and devastating form of computer vandalism. Now the two firms are racing to get their sophisticated hardware and software into hundreds of key Internet chokepoints.. . .
PortSentry and Snort Compared  11 March 2001 
Source: - Posted by Pete O'Hara   
A brief description of port sentry and snort. "A port scan detector that can be configured to bind to ports you want monitored, reporting scans made to these ports and optionally running a command to deal with the scanning host . . .
Honeypots: Bait for the Cracker  08 March 2001 
Source: Wired - Posted by Dave Wreski   
The Honeynet Project team, an invitation-only security group, has been working with the project, a network that exists only to allow the team to watch who cracks it, in order to determine what crackers do and why they do it. The . . .
'Decoy nets' gain backers in battle against hackers  07 March 2001 
Source: CNN - Posted by Ryan W. Maple   
This so-called "deception" network is envisioned as more than just a single server set up to be a "honeypot," where hackers may break in, find a dead end and have their activities recorded with an eye toward prosecution. Rather, the decoy . . .
Be extremely wary not to taint computer evidence  28 February 2001 
Source: Lexis-Nexis - Posted by Benjamin D. Thomas   
We've all seen it -- the yellow tape used to cordon off a crime scene in the movies. In terms of police work, it's called securing the scene. But how many of us realize that securing the scene for a what . . .
Artificial Intelligence to detect Intrusions  17 February 2001 
Source: Karim Nasser - Posted by Ryan W. Maple   
This site, in German, talks about an artificial intelligence project to detect intrusions. "Electronic intrusion detection is much trickier than human intrusion detection. Humans can search for the intruder by opening doors, looking into closets, etc. The intruder cannot turn into . . .
monitord - Network Security Monitor  15 February 2001 
Source: - Posted by Chris Pallack   
A lightweight (distributed?) network security monitor for TCP/IP+Ethernet LANs. It will capture certain network events and record them in a relational database. The recorded data will be available for analysis through a CGI based interface. The main purpose of this project . . .
Intrusion Detection Systems, Part IV: Logcheck  15 February 2001 
Source: FreeOS - Posted by Chris Pallack   
The last in this four part series on IDS, looks at Logcheck: a software package that is designed to automatically run and check system log files for security violations and unusual activity. In the last three articles in this series, we . . .
Linux Intrusion Detection Poster  14 February 2001 
Source: SysAdmin Magazine - Posted by Dave Wreski   
SysAdmin Magazine has the contents of their recent Linux Intrusion Detection Poster available online. "No matter how security minded you are, no matter how many updates and patches you apply, there's always a chance that someone will crack one of your . . .
Luring Killer Bees With Honey  13 February 2001 
Source: NetworkComputing - Posted by Dave Wreski   
This August 2000 article describes honeypots, the legal aspects, and how to integrate it into your network. "According to the general definition, a honey pot's goal is to emulate production servers while alerting and logging intruder activity. How it should achieve . . .
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