compare HIDS and NIPS which system is considered pro-active? why?
A network-based intrusion prevention system (NIPS) is a system
used to monitor a network as well as protect the confidentiality,
integrity, and availability of a network. Its main functions
include protecting the network from threats, such as denial of
service (DoS) and unauthorized usage.
The NIPS monitors the network for malicious activity or suspicious
traffic by analyzing the protocol activity. Once the NIPS is
installed in a network, it is used to create physical security
zones. This, in turn, makes the network intelligent and quickly
discerns good traffic from bad traffic. In other words, the NIPS
becomes like a prison for hostile traffic such as Trojans, worms,
viruses, and polymorphic threats.
An intrusion prevention system (IPS) sits in-line on the network
and monitors the traffic. When a suspicious event occurs, it takes
action based on certain prescribed rules. An IPS is an active and
real-time device unlike an intrusion detection system, which is not
inline and is a passive device. IPSs are considered to be the
evolution of the intrusion detection system.
A host-based intrusion detection system (HIDS) is a system that monitors a computer system on which it is installed to detect an intrusion and/or misuse, and responds by logging the activity and notifying the designated authority. A HIDS can be thought of as an agent that monitors and analyzes whether anything or anyone, whether internal or external, has circumvented the system’s security policy.
A NIDS is often a standalone hardware appliance that includes network detection capabilities. It will usually consist of hardware sensors located at various points along the network. It may also consist of software that is installed on various computers connected along the network. The NIDS analyzes data packets both inbound and outbound and offer real-time detection.
A HIDS analyzes the traffic to and from the specific computer on which the intrusion detection software is installed. A host-based system also has the ability to monitor key system files and any attempt to overwrite these files.
However, depending on the size of the network, either HIDS or NIDS is deployed. For instance, if the size of the network is small, then NIDS is usually cheaper to implement and it requires less administration and training than HIDS. However, a HIDS is generally more versatile than a NIDS
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