There are two primary types of intrusion detection systems: host-based and network-based. Host-based IDS reside on individual hosts and monitors for attacks, while network-based IDS reside on separate systems and monitor network traffic. To effectively implement an IDS, an organization must define goals, choose what systems to monitor, determine response policies, set thresholds, and properly implement the system. Intrusion prevention takes a proactive approach by attempting to stop attacks before they reach targets.
Due to the phenomenal development of Networking technology, applications and other services, IP networks are preferred for communication, but are more vulnerable to attacks. To cope with the growing menace of security threats, security systems have to be made more intelligent and robust by introducing Intrusion Detection Systems (IDS) in the security layers of a network.
This white paper explores the role of IDS to detect attacks accurately at an early stage to minimize the impact.
Due to the phenomenal development of Networking technology, applications and other services, IP networks are preferred for communication, but are more vulnerable to attacks. To cope with the growing menace of security threats, security systems have to be made more intelligent and robust by introducing Intrusion Detection Systems (IDS) in the security layers of a network.
This white paper explores the role of IDS to detect attacks accurately at an early stage to minimize the impact.
The variety and complexity of cyber attacks is increasing. The attackers have a strong economic and political motivation thus leading to organized and targeted attacks. We have concluded that intrusions are inevitable, and have focused on strategies to work through the attack while limiting the losses. Our approach, called Self Cleansing Intrusion Tolerance (SCIT), leads to the next generation of secure servers. SCIT shifts the focus from intrusion avoidance to reducing the losses resulting from an intrusion. This additional layer of defense is justified, because the current reactive approaches cannot keep up with the rapidly increasing new threats.
An overview of software compliance management and how it relates to software asset management. Also, our services to address these issues are discussed.
Adversarial Attacks and Defenses in Intrusion Detection Systems: A SurveyCSCJournals
The world is becoming more digitized and inter-connected by the day and securing our digital infrastructure is not a topic we can take lightly anymore. Intrusion detection systems (IDSs) have been an integral part of the cybersecurity stack ever since their introduction in the 1980s. Traditionally such systems have relied on signatures and heuristics, however, recently growing demand for scalability, advances in computational power, and increasing dataset availability, have paved the way for machine learning approaches.
The challenge is that even though machine learning can do a better job at detecting intrusions in normal conditions - it itself is left vulnerable to adaptive adversaries who understand how these systems work and "think". In this survey we review the different kinds of attacks such an adversary can mount on IDSs, and perhaps more importantly, the various defenses available for making IDSs more robust. We start by proving some historic context on the matter and introducing the basic taxonomy of adversarial machine learning, before diving into the methods, attacks and defenses in the second part of the write-up.
The variety and complexity of cyber attacks is increasing. The attackers have a strong economic and political motivation thus leading to organized and targeted attacks. We have concluded that intrusions are inevitable, and have focused on strategies to work through the attack while limiting the losses. Our approach, called Self Cleansing Intrusion Tolerance (SCIT), leads to the next generation of secure servers. SCIT shifts the focus from intrusion avoidance to reducing the losses resulting from an intrusion. This additional layer of defense is justified, because the current reactive approaches cannot keep up with the rapidly increasing new threats.
An overview of software compliance management and how it relates to software asset management. Also, our services to address these issues are discussed.
Adversarial Attacks and Defenses in Intrusion Detection Systems: A SurveyCSCJournals
The world is becoming more digitized and inter-connected by the day and securing our digital infrastructure is not a topic we can take lightly anymore. Intrusion detection systems (IDSs) have been an integral part of the cybersecurity stack ever since their introduction in the 1980s. Traditionally such systems have relied on signatures and heuristics, however, recently growing demand for scalability, advances in computational power, and increasing dataset availability, have paved the way for machine learning approaches.
The challenge is that even though machine learning can do a better job at detecting intrusions in normal conditions - it itself is left vulnerable to adaptive adversaries who understand how these systems work and "think". In this survey we review the different kinds of attacks such an adversary can mount on IDSs, and perhaps more importantly, the various defenses available for making IDSs more robust. We start by proving some historic context on the matter and introducing the basic taxonomy of adversarial machine learning, before diving into the methods, attacks and defenses in the second part of the write-up.
Learning spark ch01 - Introduction to Data Analysis with Sparkphanleson
Learning spark ch01 - Introduction to Data Analysis with Spark
References to Spark Course
Course : Introduction to Big Data with Apache Spark : http://ouo.io/Mqc8L5
Course : Spark Fundamentals I : http://ouo.io/eiuoV
Course : Functional Programming Principles in Scala : http://ouo.io/rh4vv
How to Become a Thought Leader in Your NicheLeslie Samuel
Are bloggers thought leaders? Here are some tips on how you can become one. Provide great value, put awesome content out there on a regular basis, and help others.
What are the Different Types of Intrusion Detection SystemsGeekTek IT Services
The intrusion detection system alerts an administrator about suspicious malware. It is security software and there are different types which include active IDS, host-based IDS, knowledge-based IDS, and behavior-based IDS. See the mentioned slideshow to know more details about the different types of intrusion detection systems.
IDS - Intrusion Detection System presentation designed for HNDIT semester 3 OS and Security assignment.
This describe Host,Network,Anomaly,Active,Passive Intrusion Detection Systems
Network Based Intrusion Detection and Prevention Systems: Attack Classificati...researchinventy
Complex and common security attackshave become a common issue nowadays. Success rate of detecting these attacks through existing tools seems to be decreasing due to simple rule-bases Some attacks are too complex to identify for today’s firewall systems.This paper highlights various security attacks classification techniques pertaining to TCP/IP protocol stack, it also covers an existingintrusion detection techniques used for intrusion detection , and features of various open source and commercial Network Intrusion Detection and Prevention (IDPS) tools. Finally paper concludes with comparison and evaluation of an open source and commercial IDPS tools and techniques which are used to detect and prevent the security attacks.
Five Major Types of Intrusion Detection System (IDS)david rom
Intrusion Detection System (IDS) is designed to monitor an entire network activity, traffic and identify network and system attack with only a few devices.
An IDS (Intrusion detection system) is a device or software application that monitors network or system
activities for malicious activities or policy violations and produces reports to a management station. IDS
come in a variety of “flavors” and approach the goal of detecting suspicious traffic in different ways.
There are network based (NIDS) and host based (HIDS) intrusion detection systems. Some systems may
attempt to stop an intrusion attempt but this is neither required nor expected of a monitoring system.
ids&ips technique is used to capture logs,sessions,port no,trojans,and malicious activity on the networkand servers.here u can get detailed about ids and ips techniques
HBase In Action - Chapter 04: HBase table designphanleson
HBase In Action - Chapter 04: HBase table design
Learning HBase, Real-time Access to Your Big Data, Data Manipulation at Scale, Big Data, Text Mining, HBase, Deploying HBase
HBase In Action - Chapter 10 - Operationsphanleson
HBase In Action - Chapter 10: Operations
Learning HBase, Real-time Access to Your Big Data, Data Manipulation at Scale, Big Data, Text Mining, HBase, Deploying HBase
Hbase in action - Chapter 09: Deploying HBasephanleson
Hbase in action - Chapter 09: Deploying HBase
Learning HBase, Real-time Access to Your Big Data, Data Manipulation at Scale, Big Data, Text Mining, HBase, Deploying HBase
Learning spark ch04 - Working with Key/Value Pairsphanleson
Learning spark ch04 - Working with Key/Value Pairs
Course : Introduction to Big Data with Apache Spark : http://ouo.io/Mqc8L5
Course : Spark Fundamentals I : http://ouo.io/eiuoV
Course : Functional Programming Principles in Scala : http://ouo.io/rh4vv
Learning spark ch01 - Introduction to Data Analysis with Sparkphanleson
Learning spark ch01 - Introduction to Data Analysis with Spark
References to Spark Course
Course : Introduction to Big Data with Apache Spark : http://ouo.io/Mqc8L5
Course : Spark Fundamentals I : http://ouo.io/eiuoV
Course : Functional Programming Principles in Scala : http://ouo.io/rh4vv
1. Lesson 13-Intrusion Detection Overview
Define the types of Intrusion Detection Systems (IDS).
Set up an IDS.
Manage an IDS.
Understand intrusion prevention (IPS).
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Overview Overview
Intrusion detection is a reactive concept that tries to Night watchmen and guard dogs are forms of IDS.
identify a hacker when they attempt a penetration. They serve two purposes. They provide a means of
Intrusion detection can also assist in the proactive identifying that something bad was happening, while
identification of active threats. It provides indications and deterring the perpetrator.
warnings that a threat is gathering information for an
attack.
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Define the types of Intrusion
Host-Based IDS
Detection Systems
There are two primary types of A Host-based Intrusion Detection System (HIDS) resides on
IDS: a particular host and looks out for indications of attacks on
Host-based that host.
Network-based
HIDS is a system of sensors that are loaded onto various
servers within an organization. They are controlled by some
central manager.
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2. Host-Based IDS Host-based IDS
The sensors can: There are five basic types of HIDS sensors:
Look for various types of events. Log analyzers
Take action on the particular server. Signature-based sensors
Send out a notification. System call analyzers
Application behavior analyzers
File integrity checkers
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Host-based IDS Host-based IDS
Log analyzers are reactive in nature and look for events System call analyzers sit between the OS and the
that may be a security breach. applications to analyze calls being sent. It compares the
They are particularly adapted to track authorized users. calls to a database of signatures.
Signature-based sensors compare incoming traffic to a Application behavior analyzers sit between the OS and the
built-in signature. applications and examine calls to check for authorization.
They are also reactive in nature and may be used to track File integrity checkers look for changes in the file, typically
authorized users.
through checksums or digital signatures.
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Network-based IDS Network-based IDS
A NIDS resides on a separate system that watches network NIDS systems have two NICs: one is configured in stealth
traffic, looking for indications of attacks that traverse the mode to monitor the network and the second is used to
network. send alarms. (see Figure 13-2)
A NIDS places the Network Interface Card (NIC) on the The advantages of using a NIDS are the following:
It can be hidden on the network.
system into promiscuous mode to pass traffic to the NIDS
It can capture the contents of all packets traveling to a target
software for analysis.
system.
NIDS are primarily signature-based.
It monitors traffic for a large number of systems.
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3. NIDS Configuration Network-based IDS
The disadvantages of using a NIDS are as follows:
It will only alarm if traffic matches preconfigured rule.
It can miss traffic of interest because of high bandwidth usage.
It cannot determine if an attack was successful.
It cannot examine encrypted traffic.
Switched networks require special configuration.
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Set up an IDS Defining the Goals of the IDS
The effective use of an IDS must include the proper The goals of the IDS provide the requirements for the IDS
planning and involvement of executive management. policy. Potential goals include the following:
1. Detection of attacks.
The steps for creating IDS implementation are:
2. Prevention of attacks.
1. Define the goals of the IDS.
3. Detection of policy violations.
2. Choose what to monitor.
4. Enforcement of use policies.
3. Choose the response.
5. Enforcement of connection policies.
4. Set thresholds.
6. Collection of evidence.
5. Implement the policy.
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Choosing What to Monitor Example of Choosing What to Monitor
The choice of what an IDS should monitor is governed by
the goals of the IDS and the environment in which the IDS
will function.
The choice of what an IDS should monitor governs the
placement of sensors, as they must be able to see the
events of interest. (See Figure 13-3 and Table 13-1)
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4. Choosing What to Monitor Choosing How to Respond
For a network using Response choices are governed by the goals of the IDS.
switches, a NIDS sensor
When an event occurs, there are two types of responses:
will not function properly if
Passive response: a response that does not directly impede
it is just connected to a
the attacker’s actions.
switch port.
Active response: a response that does directly attempt to
Instead, you should use
impede that attacker’s actions.
the switch monitoring port
or a network tap.
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Passive Response Passive Response
A passive response is the most common type of action Passive responses include:
when an intrusion is detected. Shunning: ignoring the attack.
Passive responses have a lower probability of causing Logging: gathering basic information.
disruptions to legitimate traffic while being the easiest to Additional logging: collecting more information about the
event than is normally captured.
implement in a completely automated fashion.
Notification: informing an individual about the event.
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Active Response Active Response
Active responses include: It can also cause disruption or complete denial of service to
Termination of connections, sessions, or processes legitimate users.
Network reconfiguration Network reconfiguration may stop the intruder, but can
Deception have a negative impact on partners and customers, causing
An active response to an event allows the quickest possible loss of productivity.
action to reduce the impact of the event. See Table 13-2 for examples of responses given an IDS
policy.
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5. Setting Thresholds Setting Thresholds
Thresholds provide protection against false positive Parameters that must be considered in setting thresholds are:
indications. User expertise
They enhance the overall effectiveness of an IDS policy. Network speed
They can be used to filter out accidental events from Expected network connections
intentional events. Administrator/security officer workload
Thresholds that detect attacks should be set to ignore low- Sensor sensitivity
level probes or single information-gathering events. Security program effectiveness
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Implementing the System Implementing the System
The actual implementation of the IDS policy must be Once the IDS policy has been developed and the initial
carefully planned. threshold settings calculated, it should be put into place
There are few easier ways to disrupt a well-managed with the final policy, less any active measures.
network than to introduce a badly configured IDS. The IDS should be monitored closely for some period of
time while the thresholds are evaluated.
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Understand What an IDS Can
Manage an IDS
Tell You
To make a decision for an organization to implement an IDS, There are two components to an IDS configuration:
the organization should understand the goals of the program. The attack signatures that have been programmed into the
They are: system.
Understand what an IDS can tell. Any additional events that the administrator has identified as
being of interest.
Investigate suspicious events.
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6. Understand What an IDS Can
Investigate Suspicious Events
Tell You
When the IDS has been properly configured, the four types of When a suspicious activity occurs, any of these four steps can be
events that the IDS will show are: taken to determine if the activity constitutes an actual or attempted
intrusion:
1. Reconnaissance events
Identify the systems.
2. Attacks
Log additional traffic between the source and destination.
3. Policy violations
Log all traffic from the source.
4. Suspicious or unexplained events
Log the contents of packets from the source.
See Table 13-3~13-5 for example IDS configurations.
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Understand Intrusion
Configuration for IPS
Prevention
Intrusion prevention involves a proactive rather than reactive
approach to IDS.
To prevent an intrusion, the attack must be stopped before it
reaches the target system.
To prevent an intrusion, the actual attack must be either stopped
before it reaches the target system or stopped before the target
system can execute the code that exploits the vulnerability.
See Figure 13-5 for IPS placement.
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Understand Intrusion
Summary
Prevention
HIDS sensors such as system call analyzers and application Intrusion detection is a reactive concept that tries to
behavior analyzers have the potential to prevent an attack. identify a hacker when a penetration is attempted.
For a NIDS to prevent attacks, the standard configuration A HIDS resides on a particular host and looks for indications
must be changed to place the NIDS in line with the traffic. of attacks on that host.
IDS that are proactive can raise the potential for denial of A NIDS resides on a separate system that watches network
service and cause overall availability issues. traffic and looks for indications of attacks that traverse the
network.
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7. Summary Summary
The effective use of an IDS must include the proper An active response to an event allows the quickest possible
planning and involvement of executive management. action to reduce the impact of the event.
Passive responses have a lower probability of causing To prevent an intrusion, the attack must be stopped before
disruptions to legitimate traffic while being the easiest to it reaches the target system.
implement in a completely automated fashion.
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7