IDS

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IDS

(Intrusion Detection System) Software that detects an attack on a network or computer system. A Network IDS (NIDS) is designed to support multiple hosts, whereas a Host IDS (HIDS) is set up to detect illegal actions within the host. Most IDS programs typically use signatures of known cracker attempts to signal an alert. Others look for deviations of the normal routine as indications of an attack. Intrusion detection is very tricky. Too much analysis can add excessive overhead and also trigger false alarms. Insufficient analysis can overlook a valid attack.

Catch It at the Source
The opposite of intrusion detection is "extrusion detection." Such software examines the outgoing data in the computer to determine if malware is originating in this computer. See protocol anomaly, traffic anomaly, IPS and attack.
References in periodicals archive ?
The four new NIDs are in Amaravati, Bhopal, Jorhat, and Kurukshetra.
Fake reporting about the NID results by the two officers of health department was also raised, and the officials were warned against giving counterfeit information or data in the coming campaigns.
The driver software connects an NID to the network protocols.
In a round-robin implementation, the intermediate driver selects an NID port for each packet, starting with the first port in the network group.
([paragraph]) The first of NIDs was March 25-27, 1997, and data are incomplete.
(**) The first round of NIDs was March 3-8, and the second was March 31-April 5, 1997.
The first round of NIDs and SNIDs in the African Region (Figure 1) were conducted from January 1996 through March 1997.
Reported OPV coverage after each round of NIDs or SNIDs was [greater than or equal to] 80% in the target age group in most countries (Table 1).
In addition, Ethiopia, Gabon, and Mozambique will conduct NIDs, and countries that conducted NIDs in 1996 plan to conduct NIDs in 1997.