Intrusion detection is the process of monitoring the events occurring in a computer system or network and analyzing them for signs of possible incidents, which are violation of computer security policies. Intrusion prevention is the process of perfuming intrusion detection and attempting to stop detected possible incidents. Intrusion detection and prevention system (IDPS) are mainly focused on identifying possible incidents, gathering information about them, attempting to stop them and reporting them to security administrators. HIRE WRITERS ONLINE.
IDS have become necessary addition to the security infrastructure of almost all organizations. The types of IDPS technologies are differentiated primarily by the types of events that they monitor and the way in which they are deployed therefore it is important for them to value improvements brought by these new devices in the same way for the network systems administrators, it would be appropriate to assess the IDS to be able to choose the best before installing it on their network systems but also to continue to evaluate it efficiency in working method
Benefits of IDS
Types of IDS’S
Network intrusion detection system (NIDS) is one of common types of IDS that analyze network traffic at all layers of the OSI model and make decision about the purpose of the traffic, analyzing for suspicious activity Most NIDSs are easy to deploy on a network and can often view traffic from many systems at once
The host intrusion detection system
This type of IDS is classified into two these two are:
HIDS analyze network traffic and system specific settings such as software calls, local security policy, local log audits and more.
Network behavior anomaly detection
Network behavior anomaly views traffic on network segments to determine if anomalies exists in amount or type of traffic. Segments that usually see very little traffic or segments that see only a particular type of traffic may transform the amount or type of traffic if an unwanted event occurs.
IDS detection types
Signature based detection
An IDS can use signature based detection relying on known traffic data to analyze potentially unwanted traffic this type of detection is very fast and easy to configure however an attacker can slightly slightly modify an attacker to render it undetectable by signature based IDS
Ann IDS that looks at network traffic and detects data that is incorrect, not valid, or generally abnormal is called anomaly based detection. This method is useful for detecting unwanted traffic that is not specifically known.
Stateful protocol inspection
Stateful protocol inspection is similar to anomaly based detection, but it can also analyze traffic at the network and transport layer and vender specific traffic at the application layer, which anomaly based detection cannot do.
Advanced intrusion detection environment (AIDE)
AIDE creates a database from the regular expression found in customizable configuration file. Once this database is initialized, it can be used to verify the integrity of the files it has several massages digest algorithms that are used to check the integrity of the file.
This is a rule based system that compares events recorded in a safeguard audit trail against custom defined rules and automatically invoke a response when it detects an event of interest.IT can detect intrusion and attempt to block it.
Retina network security scanner provides vulnerability management and identifies known and zero day vulnerabilities, plus provides security risks assessment enabling security best practices
eEye secure web server protection
Secure web server security deliver integrated multilayered windows server protection. It provides application layer protection via integration with the IIS platform as ISAPI filter, protecting against known and unknown exploits zero day attacks and unauthorized web access.
GFI events manager
This is a software based events management solutions that delivers automated collection and processing of events from diverse networks, from small, single domain network to extended, mixed environment networks on multiple forest and diverse geographical locations.
Reliability: he generated alerts must be justified and no intrusion to escape.
Reactivity: An IDS must be capable to detect and to prevent the new types of attacks as quickly as possible. Thus it must constantly self-update. Capacities of automatic update are so indispensable.
Facility of implementation and adaptability: An IDS must be easy to function and especially to adapt to the context in which it must operate. It is useless to have an IDS giving out some alerts in less than 10 seconds if the resource necessary to reaction are not available to act the same constraint of time
Performance: The setting up of an IDS must not affect the performances of the supervised systems, beside it is necessary to have certainty that the IDS the capacity to treat all the information in its disposition.
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