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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.

Building an IDS Solution Using Snort  29 April 2002 
Source: - Posted by Dave Wreski   
This document provides a step-by-step guide to building an intrusion detection system using open-source software. The process involves Installing RedHat Linux 7.1, Compiling/Installing and configuration of MySql/Apache/ACID/Snort, Setup of Snort rules f Hardening of Machine The document assumes a basic level understanding of linux and computer technologies.. . .
Evasion tool puts Snort's nose out of joint  17 April 2002 
Source: vnunet - Posted by Dave Wreski   
The darling of the intrusion detection system (IDS) industry had its nose put out of joint yesterday when a security developer released an evasion tool capable of undermining it. Open source development Snort has been heralded as one of the most flexible IDS offerings, comparing well with alternative commercial products.. . .
Monitoring reduces security risks  11 April 2002 
Source: The Register - Posted by Jen Olson   
Counterpane today released statistics to back its claim that customers of its monitoring services are far less likely to have their networks penetrated. In the first quarter of 2002, Counterpane monitored approx. 200 networks worldwide and processed 31 billion network . . .
How to detect intruders with ACID  11 April 2002 
Source: LinuxWorld - Posted by Jen Olson   
All it takes is time and free software to set up a powerful intrusion detection system for your Unix system. Follow along as Joe Barr installs ACID on his system and discovers a big security hole. I wanted to try ACID . . .
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 . . .
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