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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.

The art of Computer Forensics  01 November 2001 
Source: Lexis-Nexis - Posted by Benjamin D. Thomas   
When the perpetrator deletes files, or when pieces of a file are fragmented all over the place, hard disk/floppy disk examination is another technique that computer forensic scientists employ. Basically, this looks at all the bits on the magnetic media to . . .
Hacker intrusion collusion creates 'perfect IDS'  31 October 2001 
Source: VNUNet - Posted by Benjamin D. Thomas   
Three months after the infamous Def Con hacker fest back in July, a group of geeks have published data which they claim may prove to be the ultimate Intrusion Detection System (IDS) test bed. Each year the Def Con meeting . . .
Xprobe and Nmap Fingerprint Analysis  31 October 2001 
Source: Help Net Security - Posted by Benjamin D. Thomas   
I wrote the following to illustrate how easy it is for IDS to identify Nmap OS detection, and the difficulty in detecting Xprobe OS detection. While Xprobe would be my favorite OS detection tool, a lot of work needs . . .
Tripwire aims to lock down routers, switches  29 October 2001 
Source: ComputerWorld - Posted by Jen Olson   
Working from the idea that intruders can't do much lasting damage to your network if they can't make changes to files, Tripwire Inc. on Monday announced a new version of its security lockdown software, Tripwire for Routers and Switches. The product, . . .
Cybernarks - Who's hunting the Hackers?  27 October 2001 
Source: ZDNet - Posted by Benjamin D. Thomas   
Steven Lynch was first introduced to the joys of hunting down hackers in MIT in 1989. While working in the University's IT department he came across Australia's very own Leftist and Urvile, as they took control of the institutions servers and . . .
Intrusion Detection Systems for the Uninitiated, Part 2; Installing and Configuring Snort  26 October 2001 
Source: - Posted by Dave Wreski   
Snort is a lightweight network-based intrusion detection system (called NIDS). NIDS is unlike 'portsentry', which is a host based IDS and capable of performing real-time traffic analysis and packet logging on IP networks. The reason Snort is called 'lightweight' NIDS, is . . .
Intrusion Detection Systems for the Uninitiated, Part 2; Installing and Configuring Snort  17 October 2001 
Source: - Posted by Derrick Lewis   
Shashank Pandey returns to with part two of his popular series on IDS: Intrusion detection Systems for Linux. Quizzing PortSentry in his last article, in today's Pandey cast a sharp eye over working with snort. And remember in some primitive . . .
How to tell if your Linux box has been cracked  16 October 2001 
Source: - Posted by Benjamin D. Thomas   
Over the last two weeks, I've discussed how to prevent crackers from gaining access to your Linux computer (see 10 minutes to an iptables-based Linux firewall and How to stop crackers with PortSentry). This week, we continue the series with ways . . .
The Value of Honeypots, Part One: Definitions and Values of Honeypots  11 October 2001 
Source: Security Focus - Posted by Benjamin D. Thomas   
Over the past several years there has been a growing interest in honeypots and honeypot-related technologies. Honeypots are not a new technology, they were first explained in a couple of very good papers by several icons in computer security: Cliff Stoll's . . .
Buyer's Guide: Network-based intrusion-detection systems  11 October 2001 
Source: NW Fusion - Posted by Dave Wreski   
Product reviews, analysis, and NIDS testing and results. Good set of links for those interested in Linux and other solutions. "The future of intrusion detection is hybrids of network- and server-based products, faster speeds and improved event correlation and analysis. But . . .
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