Network Intrusion Detection System

Identification, ID, IDS, IPS, and displaced personsa

Intrusion Detection (ID), drives the process of monitoring and analyzing events network system for signs of incidents (eg, violations or threatened eminent).

IDS use both hardware and software to detect intrusions by triggering alarms when something seems out of the ordinary (for example, intruders or insider attacks) on a network or host. In other words, IDSs are designed to detect attacks (do not stop them from happening).

To prevent the attacks or even block suspicious traffic, however, an Intrusion Prevention System (IPS) is used, an IDPS (Intrusion Detection and Prevention System) is deployed to collect information, logging, detection and prevention.

Types of intrusion detection systems-

the NIDS network-based IDS

- It is used to monitor a network of networks and backbone

the HIDS Host-based IDS

- It is used to protect and monitor the operating systems on hosts

the DIDS Distributed based IDS

- It is used to report to a central management

the PIDS protocol-based IDS

- It is used to monitor and analyze the communication protocol between devices connected

the APID Application protocol-based IDS

- It is used to monitor and analyze the communication on the implementation of specific protocols

About NEST

What is NIDSa

A system for network intrusion detection (NIDS) is an intrusion detection system that tries to detect malicious activity such as denial of service attacks, port scans or even attempts to hack into computers by monitoring traffic network.

NIDS does this by reading all incoming packets and try to find suspicious behavior. If, for example, many TCP connection requests to a large number of different ports are observed, one can assume that someone is committing a "port scan" to some of the computer (s) the network. He also (mostly) trying to detect incoming shellcode in the same manner as a detection system intrusion is common.

A NIDS is not limited to inspect the network traffic only. Often, valuable information about an intrusion in progress can be drawn from local or outgoing traffic as well. Some attacks might even be staged inside the monitored network or network segment, and are therefore not considered to incoming traffic at all.

Often, intrusion detection systems network working with other systems as well. They may, for example to update the blacklist certain firewall "with the IP addresses of computers used by the (alleged) crackers.

How to install a NIDSa

NIDS are easy to deploy and configure. Normally, this is a dedicated workstation that is connected to the network, but it can also be a device that has the software built into it and is then connected to the network.

A NIDS is connected to a hub, a switch network must be configured for port mirroring, or is displayed as a network tap. It functions as a "package-sniffers.

Example NIDS Snort (freeware) and Sax2 . Other network-based IDS include: Shadow Dragon, NFR, RealSecure, and NetProwler.

Benefits of a NIDS play an important role in the world of network security. They help prevent the consequences caused by the intrusions detected on the network.

Placement of a NIDS can detect

1. Unauthorized users (insiders and outsiders)
2. Abuse or excessive bandwidth and denial of service (DoS)
.