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Topic: Network intrusion detection system

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	FAQ: Network Intrusion Detection Systems
		After all, blocking intrusions is their primary purpose; it would be foolish not to detect intrusions as well.
		Personally, the system I use is an old Pentium-90 computer with a 6-gig drive, CD-ROM writer, and a sniffing utility that dumps all the network traffic (a 416-kbps DSL connection) to packet capture files on the disk.
		Network intrusion detection systems are unreliable enough that they should be considered only as secondary systems designed to backup the primary security systems.
	www.linuxsecurity.com /resource_files/intrusion_detection/network-intrusion-detection.html (17834 words)

	Network Intrusion Detection
		With that said, the method of detecting intrusions, how to monitor, and how to interpret the data is a complex subject.
		This kind of intrusion system can be especially effective when a server is in an area off the firewall such that it is neither on the internet or on the internal network { Known as a Demilitarized zone (DMZ) }.
		Intrusion detection systems typically consist of two parts which are an engine and a control console.
	www.comptechdoc.org /independent/security/recommendations/secintdet.html (431 words)

	Talisker Network Intrusion Detection Systems
		Snort-based Cyclops IDS provides advanced and flexible intrusion detection at Gigabit speeds and secures networks by performing high-speed packet analysis to detect malicious activities in real-time and automatically launch preventive measures before security can be compromised.
		Passive intrusion detection deployments are possible without costly switch and router resources or reconfiguration, and without creating a failure point in the network.
		Intrusion prevention deployments can be configured to block or pass network traffic on failure, with the option for hot-standby and high availability.
	www.networkintrusion.co.uk /N_ids.htm (2126 words)

	Bro Intrusion Detection System - Bro Overview
		Bro detects intrusions by first parsing network traffic to extract is application-level semantics and then executing event-oriented analyzers that compare the activity with patterns deemed troublesome.
		If Bro detects something of interest, it can be instructed to either generate a log entry, alert the operator in real-time, execute an operating system command (e.g., to terminate a connection or block a malicious host on-the-fly).
		Bro is designed for use by Unix experts who place a premium on the ability to extend an intrusion detection system with new functionality as needed, which can greatly aid with tracking evolving attacker techniques as well as inevitable changes to a site's environment and security policy requirements.
	www.bro-ids.org (363 words)

	Talisker Intrusion Detection Prevention Systems
		Intrusion Prevention Systems take this concept to the next level and sit inline blocking the packets you tell them to based on signatures as per the IDS.
		Network IPS sit inline on the network, statefully analyzing packet content and block certain packets that match a signature and alert on others.
		Switched and/or hi-speed networks have brought with them a problem, many network IDS are unreliable at high speeds, dropping a hi percentage of the network packets.
	www.networkintrusion.co.uk /ids.htm (638 words)

	Define NIDS - Network Intrusion Detection System
		Meaning of NIDS — “Network Intrusion Detection System”, is a security system that detects malicious activity on your network by hackers or others attempting to misuse or break into your system.
		A Network Intrusion Detection System works by monitoring packets on a network and tries to find out if a hacker is attempting to break into your system or cause denial of service attacks or other malicious activity.
		As traffic crosses the network segment, the NIDS uses a signature-based approach similar to that of an antivirus scanner to examine the packet.
	www.birds-eye.net /definition/n/nids-network_intrusion_detection_system.shtml (666 words)

	SecurityDocs: Intrusion Detection
		The paper describes an Intrusion Forecasting System which is the future of the present intrusion detection systems.It discusses the present intrusion detection systems, need to develop an Intrusion Forecasting System, architecture of the system, the implementation and explains the techniques to be used in developing such a system.
		Network Intrusion Detection System(NIDS) has been outsourced to vendor who installed and managed the system the past 3 years.
		Intrusion detection systems rely on network traffic and/or system audit data as their main input sources.
	www.securitydocs.com /Intrusion_Detection (870 words)

	Nick Pongratz's Neural Network Intrusion Detection System
		Networking is becoming so entrenched in our society that pretty soon devices such as our toasters will be part of Home Area Networks.
		The beauty of a neural network intrusion detection system (NNIDS) is that a neural network is not limited to the knowledge held by its programmer.
		If the network's suggestions is different from the actual user, of if the network does not have a clear suggestion, signal an anomaly.
	www.cs.wisc.edu /~nicholau/research/bioCVG/myNNADS.html (858 words)

	STSC CrossTalk - Intrusion Detection: Implementation and Operational Issues - Jan 2001 (Site not responding. Last check: 2007-10-12)
		In this case, intrusion manifestations are viewed as the signal to be detected while manifestations of normal operations are considered to be noise.
		Since most real-time commercial ID systems base their detection approach on known attempts to exploit known vulnerabilities, an administrator's time is often better spent minimizing vulnerability by applying patches or other security measures.
		Detecting and responding to penetration attempts that cannot succeed (such as UNIX-specific attempts against a network of Windows machines) is not an effective use of resources except as an indication of threat level.
	www.stsc.hill.af.mil /crosstalk/2001/01/mchugh.html (3395 words)

	SecurityDocs: Comment on The Use of Network Intrusion Detection System
		All these terms point to one thing, there are invisible intrusions coming off the network wire lying on your desk, at the corner of the office, hiding in the cabling closet in the building riser.
		An IPS detects abnormal activities; for example, there is a suspicious TCP connection, the IPS can inject a TCP packet to drop the connection to prevent further damages to the target.
		One or more of your systems could have been compromised and become the victims or robots that are used by the hackers to achieve their goals.
	www.securitydocs.com /library/2650 (1552 words)

	Lenny Zeltser - Intrusion Detection Analysis: A Case Study
		Network traces were obtained using Argus, a network transaction auditing engine that records changes in the state of TCP/IP connections.
		According to network engineers at my.net, the effects seen by the IDS were attributable to a misconfigured load-balancing mechanism that was being installed at the time of the "incident." Alerts stopped as soon as the load balancer was configured properly.
		Detect Generated By This detect was generated using Argus, which was tuned to warn about destination ports that are not typically used in the organization.
	www.zeltser.com /intrusion-detection-analysis (12817 words)

	What is intrusion detection system? - A Word Definition From the Webopedia Computer Dictionary
		An intrusion detection system (IDS) inspects all inbound and outbound network activity and identifies suspicious patterns that may indicate a network or system attack from someone attempting to break into or compromise a system.
		Like a virus detection system, misuse detection software is only as good as the database of attack signatures that it uses to compare packets against.
		In anomaly detection, the system administrator defines the baseline, or normal, state of the network’s traffic load, breakdown, protocol, and typical packet size.
	www.webopedia.com /TERM/I/intrusion_detection_system.html (506 words)

	Macintosh Security Site -> Snort - Network Intrusion Detection System on Mac OS X
		Snort is a lightweight network intrusion detection system, capable of performing real-time traffic analysis and packet logging on IP networks.
		Snort uses a flexible rules language to describe traffic that it should collect or pass, as well as a detection engine that utilizes a modular plugin architecture.
		It can be used as a straight packet sniffer like tcpdump(1), a packet logger (useful for network traffic debugging, etc), or as a full blown network intrusion detection system.
	www.securemac.com /macosxsnort.php (508 words)

	Free Intrusion Detection IDS Program SSL Best Trial IDS
		Top Layer Intrusion Prevention System: is a family of network Intrusion Prevention Systems that has been designed to deliver non-disruptive protection against risks and losses associated with cyber threats and network attacks.
		BenNids: Network Intrusion Detection System is an experimental pcap-based NIDS for Linux.
		Covert Channels and Tunnels Detection : The main goal of this project is to provide a way to register and disclose informations leading to the detection of unauthorized tunnels and covert channels embedded into the HTTP protocol.
	www.all-internet-security.com /intrusion_detection (2274 words)

	Intrusion Detection Software: Compare network intrusion detection systems
		Inspects inbound and outbound network activity and identifies suspicious patterns that may indicate an attack.
		Intrusion detection and security auditing solution that provides protection for enterprise databases.
		Network intrusion detection system that combines speed with accuracy to make your information truly valuable.
	www.capterra.com /intrusion-detection-solutions (410 words)

	Network Intrusion Detection (Site not responding. Last check: 2007-10-12)
		A network intrusion detection system (NIDS) tries to detect malicious activity such as denial of service attacks, port-scans or even attempts to crack into computers by monitoring network traffic.
		It also (mostly) tries to detect incoming shellcodes in the same manner that an ordinary intrusion detection systems does.
		Some attacks might even be staged from the inside of the monitored network or network segment, and are therefore not regarded as incoming traffic at all.
	www.network-intrusion-detection.com /info.html (202 words)

	Network Intrusion Detection Signatures, Part Four
		This is the fourth in a series of articles on understanding and developing signatures for network intrusion detection systems.
		In the previous article, we began to examine the topic of protocol analysis, which means that the intrusion detection system actually understands how various protocols, such as FTP, are supposed to work.
		She is one of the authors of “Intrusion Signatures and Analysis", and she is a contributing author to the "Handbook of Computer Crime Investigation".
	www.securityfocus.com /infocus/1553 (1961 words)

	Setting Up an Intrusion Detection System - Security - Network Computing
		An intrusion-detection system (IDS) can help you understand how the attacker is reaching your systems, how your systems are responding and, most important, how a successful breach may have duped your systems into launching new attacks.
		The network security stakes are high: The recent Slammer worm, for instance, caused an estimated $1 billion-plus in damage to networks and systems.
		Be sure an IDS at this location can examine packets traversing the network in both directions--it's easy to set up a device on a half-duplex link inadvertently and miss traffic critical to determining the nature of an attack.
	www.networkcomputing.com /showitem.jhtml?docid=1513ws1 (777 words)

	A High-Performance Network Intrusion Detection System (Site not responding. Last check: 2007-10-12)
		To build survivable systems, attacks must be detected and reacted to before they impact performance or functionality.
		Previous survivable systems research focussed primarily on detecting intrusions, rather than on preventing or containing damage due to intrusions.
		Our host-based mechanisms for attack detection and isolation coordinate with network routers enhanced with active networking technology in order to trace the origin of the attack and isolate the attacker.
	seclab.cs.sunysb.edu /sekar/abs/discex00.htm (229 words)

	What is intrusion detection? - a definition from Whatis.com - see also: IDS, intrusion, intrusion detection system
		An ID system gathers and analyzes information from various areas within a computer or a network to identify possible security breaches, which include both intrusions (attacks from outside the organization) and misuse (attacks from within the organization).
		ID systems are being developed in response to the increasing number of attacks on major sites and networks, including those of the Pentagon, the White House, NATO, and the U.S. Defense Department.
		The first procedures are host-based and are considered the passive component, these include: inspection of the system's configuration files to detect inadvisable settings; inspection of the password files to detect inadvisable passwords; and inspection of other system areas to detect policy violations.
	searchsecurity.techtarget.com /sDefinition/0,,sid14_gci295031,00.html (404 words)

	SANS Institute - Intrusion Detection FAQ
		If someone from a large organization called and asked you for advice on what he or she should do first to get started on Intrusion Detection, what one thing would you recommend?
		Why is intrusion detection required in today's computing environment?
		Intrusion Detection System Evasion and Denial of Service Using RPC Design Flaws
	www.sans.org /resources/idfaq (701 words)

	Talisker Security Wizardry Computer Security Portal Home Page
		This site is a vendor independent portal to the Computer Network Defence Product and Service space.
		was designed and built to cater for the demands of Government and Military networks requiring near real time information on new and emerging cyber threats.
		It's public availability and lack of corporate identity has resulted in almost every industry, including home users, taking advantage of it either on an occasional basis or full time on plasma screens.
	www.networkintrusion.co.uk (135 words)

	Solaris Operating System Network Intrusion Detection (SC-345) (Site not responding. Last check: 2007-10-12)
		The Solaris Operating System Network Intrusion Detection course provides students with the knowledge and skills necessary to perform the advanced administration skills required to firewall, monitor, log, identify and respond to network security breaches.
		Students who can benefit from this course are experienced system administrators who are tasked with protecting Sun Solaris systems in a non-trusted environment such as the Internet or a LAN environment with multiple unknown/untrusted users.
		Describe common network attacks: denial-of-service, software buffer overflow, poor system configuration, password guessing/cracking
	www.sun.com /training/catalog/courses/SC-345.xml (678 words)

	Cisco Intrusion Prevention System - Products & Services - Cisco Systems
		Cisco IPS 4200 Series sensors offer significant protection to your network by helping to detect, classify, and stop threats, including worms, spyware/adware, network viruses, and application abuse.
		As a result, more threats can be stopped without the risk of dropping legitimate network traffic.
		An appliance-based solution that correlates data from across the enterprise and uses your existing network and security investments to identify, isolate, and recommend precision removal of offending elements.
	www.cisco.com /en/US/products/sw/secursw/ps2113/index.html (215 words)

	Intrusion - Network World
		As network threats continue to grow in number and sophistication, a new technology offers an additional layer of protection.
		After having gone through a couple rounds of viruses such as SoBig.F and MyDoom - including a potential intrusion into the network - management is allowing us to add some solutions to the network that will do virus scanning on more than just e-mail...
		Your FREE Network World subscription will also include breaking news and information on wireless, storage, infrastructure, carriers and SPs, enterprise applications, videoconferencing, plus product reviews, technology insiders, management surveys and technology updates - GET IT NOW.
	www.networkworld.com /topics/intrusion.html (760 words)

	eTrust® Intrusion Detection, Security Management
		Network access control ensures only authorized use of resources
		eTrust Intrusion Detection is a complete session security solution that incorporates three key security capabilities into one package — a comprehensive network intrusion management and prevention system, real-time session monitoring and Internet web filtering.
		These solutions work together to address specific security requirements, forming a complete network defense without the high-cost, administrative overhead and non-integrative approach associated with separate products from different vendors.
	www3.ca.com /Solutions/Product.asp?ID=163 (81 words)

	Snort - the de facto standard for intrusion detection/prevention
		Starting December 1st 2006, changes to the subscription service will make access to real-time Sourcefire VRT Rule updates affordable to every user in the community.
		It is based on the code from the Analysis Console for Intrusion Databases (ACID) project.
		This application provides a web front-end to query and analyze the alerts coming from a SNORT sensor.
	www.snort.org (195 words)

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