basics of intrusion detection systems

... the Intrusion Detection Working Group (IDWG) and its efforts to define formats and procedures for information sharing between intrusion detection systems and components In their Intrusion Detection ... to Internet - -Increase frequency of intrusion detection reporting Increase frequency of intrusion detection reporting * *Place “call pre-emption” capability (software and personnel) in standby ... ©2000, 2001 24 We will continue our discussion of intrusion detection analysis techniques by looking at some of the current methods of performing intrusion detection In the section following this one,...

Ngày tải lên: 04/11/2013, 13:15

... version and status of the sensor (whether it is running): Reference: Cisco Secure Intrusion Detection System Internal Architecture Cisco IDS Sensor Software - Cisco Intrusion Detection System Sensor ... ftp://user@10.0.0.1//IDSMk9-sp3.0-3-S10.exe Reference: Cisco Intrusion Detection System -Upgrading the Intrusion Detection System Module Q.29 Exhibit: Given the output of the idsstatus Sensor command What function ... Explanation: Intrusion detection systems typically implement obfuscation defense - ensuring that suspect packets cannot easily be disguised with UTF and/or hex encoding and bypass the Intrusion Detection...

Ngày tải lên: 17/01/2014, 14:20

... in the form of a response EXISTING SYSTEMS AND THEIR PROBLEMS Here we describe some of the important Intrusion Detection systems and their problems 4.1 Existing Intrusion Detection Systems Snort: ... communications, analyzing the stream of packets which travel across the network [22] 3.3 Components of Intrusion Detection System An intrusion detection system normally consists of three functional components ... mscan, nmap etc 3.2 Classification of Intrusion Detection Intrusions Detection can be classified into two main categories They are as follow: Host Based Intrusion Detection: HIDSs evaluate information...

Ngày tải lên: 05/03/2014, 23:20

... Signature Detection    Also referred to as operational detections or rule-based detections Inspect current events and decide whether they are acceptable Two types of signature detections:  A set of ... Threshold values of certain measures    Simple but inaccurate Count No of occurrences of certain events during a period of time User profile  More accurate  Collect past events of a user to ... security needs of a system and produce a security profile for the target system Detection  Collect system usage events and analyze them to detect intrusion activities   User profile, acceptable...

Ngày tải lên: 06/03/2014, 16:20

... Signature Detection    Also referred to as operational detections or rule-based detections Inspect current events and decide whether they are acceptable Two types of signature detections:  A set of ... Threshold values of certain measures    Simple but inaccurate Count No of occurrences of certain events during a period of time User profile   More accurate Collect past events of a user to ...  Detection   Evaluate security needs of a system and produce a security profile for the target system Collect system usage events and analyze them to detect intrusion activities  User profile,...

Ngày tải lên: 15/03/2014, 16:20

... chapter explains intrusion detection as well as Cisco’s spin on the process We cover basic threats and types of attacks and provide an overview of the various types of intrusion detection, such ... you from IDS basics to the configuration of your own custom IDS sensor signatures.The following contains an overview of each chapter I Chapter 1: Introduction to Intrusion Detection Systems This ... of IDS functions such as Network-based intrusion detection systems (NIDS) and hostbased intrusion detection systems (HIDS) We’ll examine each of these and other types throughout this chapter...

Ngày tải lên: 25/03/2014, 11:09

... “Multilayer statistical intrusion detection in wireless networks,” coauthored by Mohamed Hamdi et al., a vertical stack, from physical to transport layer, of traffic anomaly detection mechanisms is ... wireless signal strength transition detection (MAC address spoofing) and the traffic rate process anomaly detection (network intrusion) which are the key components of the multilayer NIDS described ... bots In the world of online games, these game bots are often considered as “intrusions,” because the bots, unlike human players, never get tired They have proposed a number of methods based on...

Ngày tải lên: 21/06/2014, 22:20

... top-right of Figure summarizes our taxonomy of Internet epidemic detection and defenses 10 12 Intrusion Detection Systems Intrusion Detection Systems 3.1 Source detection and defenses Source detection ... Epidemics: Attacks, Detection and Defenses, and and Trends Fig A Taxonomy of Internet Epidemic Attacks, Detection and Defenses, and Trends 4 Intrusion Detection Systems Intrusion Detection Systems and ... propagation Intrusion Detection Systems Intrusion Detection Systems x 10 Number of infected hosts 3.5 2.5 1.5 IS LS RoS HS RS 0.5 0 0.5 1.5 Time (second) 2.5 3.5 x 10 Fig Epidemic propagation speeds of...

Ngày tải lên: 27/06/2014, 05:20

... top-right of Figure summarizes our taxonomy of Internet epidemic detection and defenses 10 12 Intrusion Detection Systems Intrusion Detection Systems 3.1 Source detection and defenses Source detection ... Epidemics: Attacks, Detection and Defenses, and and Trends Fig A Taxonomy of Internet Epidemic Attacks, Detection and Defenses, and Trends 4 Intrusion Detection Systems Intrusion Detection Systems and ... propagation Intrusion Detection Systems Intrusion Detection Systems x 10 Number of infected hosts 3.5 2.5 1.5 IS LS RoS HS RS 0.5 0 0.5 1.5 Time (second) 2.5 3.5 x 10 Fig Epidemic propagation speeds of...

Ngày tải lên: 29/06/2014, 13:20

... Example: the detection of specific data packets that originate from a user device rather than from a network router Anomaly-Based IDS Overview of Anomaly-Based IDS Pros Unknown attack detection ... Network IDS Comparison of Host IDS and Network IDS Pros Host IDS • • • Network IDS • • • Cons Verification of success or failure of an attack possible Has a good knowledge of the host's context ... types of potential intruders exist:    Outside intruders: referred to as crackers Inside intruders: occur from within the organization IDSs are effective solutions to detect both types of intrusions...

Ngày tải lên: 01/08/2014, 07:20

... chapter explains intrusion detection as well as Cisco’s spin on the process We cover basic threats and types of attacks and provide an overview of the various types of intrusion detection, such ... you from IDS basics to the configuration of your own custom IDS sensor signatures.The following contains an overview of each chapter I Chapter 1: Introduction to Intrusion Detection Systems This ... of IDS functions such as Network-based intrusion detection systems (NIDS) and hostbased intrusion detection systems (HIDS) We’ll examine each of these and other types throughout this chapter...

Ngày tải lên: 13/08/2014, 15:20

... hardware and Host IDS software, well-crafted Cisco IDS software, and powerful, scalable Cisco IDS management software Cisco’s Intrusion Detection approach is backed by the power of Cisco Support and ... to select the placement of sensors Placing Sensors Based on Network and Services Function With technological changes and new threats, the placement of intrusion detection systems has evolved over ... headquarters of ce As a consultant, you have been asked to review the ACME Company security stance with specific regards to Intrusion Detection ACME has a very limited deployment of IDS, but, because of...

Ngày tải lên: 13/08/2014, 15:20

... organizations often struggle with intrusion detection solutions.The solutions are not always as straightforward as you might think One of the major drawbacks of IDS solutions is experience with intrusion ... are running In the Number of Restarts field, enter the number of restart attempts PostOffice makes for downed services If PostOffice cannot start the service in the number of times specified, a Daemon ... out -of- band network, command network, and so on).You have the option of simply identifying a network here without supplying any of the addressing by checking the Unnumbered box at the bottom of...

Ngày tải lên: 13/08/2014, 15:20

... IDS Software from Version 4.0 to 4.1 At the time of this writing, the latest major version of Cisco’s IDS sensor software was 4.1.The only way to upgrade to this version of the IDS sensor software ... software supports autoupdating of sensor software and signature packs.The configuration of the autoupdate feature can be done either through the command line or with the IDM.Updating Sensor Software ... Cisco Systems periodically releases updates of sensor software and signature versions It is highly recommended that you regularly install the updates of signature versions as well as sensor software...

Ngày tải lên: 13/08/2014, 15:20

... Downloading the image File 01 of 05 Downloading the image File 02 of 05 Downloading the image File 03 of 05 Downloading the image File 04 of 05 Downloading the image File 05 of 05 FTP STATUS: Installation ... Header field Maximum length of the Arguments field Maximum length of the Header field Maximum length of the Request field Maximum length of the URI field Comma-separated list of ports or port ranges ... C:\Program Files\Cisco Systems\ Netranger/etc/packetd conf Adding signature: SigOfGeneral 993 to C:\Program Files\Cisco Systems\ Netranger/etc/packetd.conf Adding signature: SigOfGeneral 1107 to C:\Program...

Ngày tải lên: 13/08/2014, 15:20

... provides them as more of an FYI of the different types of traffic that is traversing your network.This severity level is mapped to the None and Informational signatures Some examples of these signatures ... Depending on the attack patterns in your environment, you may see some of these, all of these, or none of these The different types of signatures are also grouped by traffic patterns Groups include: ... Signature Detection, which does not consider any context.The most common implementations of ContextBased Signature Detection are to look for attack signatures in particular fields or use a particular offset...

Ngày tải lên: 13/08/2014, 15:20

... start to consider the effects on the traffic-capturing process and the implementation of intrusion detection systems Let’s see what the major difference between hubs and switches is and what problems ... exclusion of broadcast packets.There are several options available to avoid this problem (besides using hubs instead of switches, which is usually not practical from the point of view of bandwidth ... to provide the greatest benefit Scalable management of IDS sensors is needed to meet the needs of an enterprise network.The Cisco Intrusion Detection System Management Center is designed to provide...

Ngày tải lên: 13/08/2014, 15:20

... The Subsystem Report The Cisco Intrusion Detection System has many subsystems.These subsystems include the Management Center, the Security Monitor, and other subsystems The Subsystem Report shows ... I Performance I Signatures I Intrusion Response options Supported Router Platforms One of the major benefits of using IOS-based IDS is that you can add intrusion detection functionality to your ... in case of a new threat for which no signature is available yet, such as the recent SQL Slammer Worm NOTE Be aware that the current test material of the Cisco Secure Intrusion Detection Systems...

Ngày tải lên: 13/08/2014, 15:20

... when a series of UDP connections to a number of different destination ports on a specific host have been initiated.This is an indicator of a reconnaissance sweep of your network Be wary of potentially ... fires on receipt of packets bound for port 23 of a Cisco router that are indicative of attempt to crash the router by overflowing an internal command buffer This is an indicator of an attempt to ... “send and pray” type of packet You never know if they made it to their destination or not Many of these signatures can cause enormous amounts of logs Cisco has disabled most of these by default...

Ngày tải lên: 13/08/2014, 15:20

... 121, 178 Cisco PostOffice Protocol See PostOffice Protocol Cisco Secure Intrusion Detection (CSID) Director for Unix See CSID Director for Unix Cisco Secure Intrusion Detection Systems Exam (CSIDS ... level, 334 Honeyd software, 28 Honeynets software, 28 honeypots, 28 Host IDS, 3, 26, 27 Host IDS sensors, 49–51 Host Sensor Console software, 49 host-based intrusion detection systems See Host ... Down: One or more of the IDS sensor services has stopped I 999 - Daemon Unstartable: One or more of the IDS sensor services is unable to be started IDS signatures grouped by software release version...

Ngày tải lên: 13/08/2014, 15:20