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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.



Snort Version 1.8.6 Released  11 April 2002 
Source: Snort Project - Posted by Dave Wreski   
This is the first official announcement of a new Snort version in several months and it contains a multitude of fixes over previous versions. While the official releases have gone very slowly lately, the development of snort has picked up immensely.. . .
 
Incident Analysis of a Compromised RedHat Linux 6.2 Honeypot  10 April 2002 
Source: Stephen Holcroft - Posted by Dave Wreski   
"So how long on average does a default server installation of Redhat 6.2 last on the internet?" Stephen details how the shortest time was as little as 26 minutes in this in-depth analysis of monitoring his honeynet.. . .
 
Basic Steps in Forensic Analysis of Unix Systems  09 April 2002 
Source: Dave Dittrich - Posted by Dave Wreski   
Your job, as a forensic investigator, is to do your best to comb through the sources of evidence -- disc drives, log files, boxes of removable media, whatever -- and do two things: make sure you preserve as much of this data in its original form, and to try to re-construct the events that occurred during a criminal act and produce a meaningful starting point for police and prosecutors to do their jobs.. . .
 
Snort creator takes business to the big leagues  05 April 2002 
Source: WashTech - Posted by Benjamin D. Thomas   
Four years ago, Martin Roesch started work in his Eldersburg, Md., living room on a program to ward off such damaging attacks on fragile technology systems. What started as a weekend hobby for Roesch, a techie with expertise in network security, . . .
 
How to Plan for the Inevitable  29 March 2002 
Source: CIO - Posted by Dave Wreski   
A great story about how Fleet developed an incident response plan. "Wondering how Fleet kept track of transaction history, he entered a random number. To his shock, he pulled up someone else's transaction. "The hole allowed you to see people's personal information," says Bryce, who works for Rackspace Managed Hosting in San Antonio.. . .
 
Increasing Performance in High Speed NIDS  15 March 2002 
Source: Neil Desai - Posted by Pete O'Hara   
This PDF document is a very technical overview of the Snort NIDS, and discusses efforts currently underway to improve the performance of Snort. "The increasing of network utilization and the weekly increase in the number of critical application layer exploits means . . .
 
Corporates sign up for computer forensics training  03 March 2002 
Source: IDG - Posted by Nick DeClario   
A growing number of businesses are choosing to do their own research into cybercrime rather than go to the police, and are signing up for forensics training to help them uncover employee misdeeds and security breaches, according to Guidance Software Inc.. . .
 
Biatchux Bootable CD Forensics Toolkit  23 February 2002 
Source: Biatchux Project - Posted by Dave Wreski   
Biatchux is a portable bootable cdrom based distribution capable of providing an immediate environment for performing forensics analysis, incident response, data recovery, virus scanning and pen-testing. Also capable of providing necessary tools for live forensics/analysis, just mount the cdrom on your . . .
 
Network Intrusion Detection Signatures, Part 3  20 February 2002 
Source: SecurityFocus - Posted by Benjamin D. Thomas   
This is the third in a series of articles on understanding and developing signatures for network intrusion detection systems. In Part One and Part Two, we examined the use of IP protocol header values, particularly TCP, UDP and ICMP, in network . . .
 
Free, dependable IDS  12 February 2002 
Source: InfoWorld - Posted by Jen Olson   
Historically, any enterprise search for a host-based IDS (intrusion-detection system) to protect its Linux environment has found itself stymied by a lack of available solutions. Network-based IDSes such as Snort have been available for some time, but the host-based approach offers certain advantages, such as the capability to detect attacks that network-based solutions sometimes miss and greater flexibility for fine-tuning which activities should be monitored.. . .
 
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