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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.



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 . . .
 
Two sides of the security coin  12 April 2001 
Source: News.com - Posted by Pete O'Hara   
Hackers and security experts may share a similar motto: Know thine enemy. In February 2000, David Dittrich, the 39-year-old security administrator for the University of Washington, and "Mixter," a 22-year-old creator of tools for launching attacks against Web sites, faced off . . .
 
Computer Forensics  09 April 2001 
Source: SC Magazine - Posted by Jen Olson   
"The ease of perpetrating a cybercrime, the relative anonymity afforded the offender, and the difficulty in pursuing and tracking down the offender, all contribute to the rise in the frequency of these types of crimes," say Dave Schultz and Jeff Lendino, . . .
 
Hackers keep ahead in the security game [Honeynet Project]  06 April 2001 
Source: ZDNet UK - Posted by Dave Wreski   
Under the Honeynet Project, Spitzner and a team of reformed hackers and security experts leave unprotected servers on the Internet and monitor them until an intruder breaks in. These "honeypots" have revealed a lot about the techniques of . . .
 
SANS Releases Info on "Adore Worm"  04 April 2001 
Source: SANS - Posted by Dave Wreski   
There is apparently a new worm to follow on the heels of the Rame and Lion worms. "Adore is a worm that we originally called the Red Worm. It is similar to the Ramen and Lion worms. Adore scans the Internet checking Linux hosts to determine whether they are vulnerable to any of the following well-known exploits: LPRng, rpc-statd, wu-ftpd and BIND. LPRng is installed by default on Red Hat 7.0 systems. From the reports so far, Adore appears to have started its spread on April 1.. . .
 
To Trap A Thief  02 April 2001 
Source: ComputerWorld - Posted by Dave Wreski   
If you want to break into a house, why spend time prying open the front door if the back door is wide open? Same goes when breaking into computer networks. Most networks and servers are set up with configuration errors that . . .
 
SANS Lion Worm Protection  01 April 2001 
Source: SANS - Posted by Nick DeClario   
Lion is a new worm, that is very similar to the Ramen worm. However, this worm is much more dangerous and should be taken seriously. It infects Linux machines with the BIND DNS server running. It is known to infect BIND version(s) 8.2, 8.2-P1, 8.2.1, 8.2.2-Px. BIND 8.2.3-REL and BIND 9 are not vulnerable. The BIND vulnerability is the TSIG vulnerability that was reported back on January 29, 2001.. . .
 
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