How does a host-based detection system signal an intrusion?

A host-based detection system functions as a critical component of a network security strategy by monitoring and analyzing activity on individual devices or hosts. When it comes to signaling an intrusion, one of its primary roles is to alert administrators about unusual patterns that may indicate unauthorized access or malicious activity on the system.

This alerting can involve various types of notifications, such as logs, messages, or alarms, that inform security personnel of potential threats. The detection system relies on predefined rules and patterns of behavior to identify anomalies, which could signify an intrusion attempt. This proactive approach helps administrators respond swiftly to potential security breaches, improving the overall security posture of the organization.

While blocking incoming traffic, terminating suspicious processes, and banning specific IP addresses are all actions that could be part of a comprehensive security strategy, they tend to be more reactive measures rather than the initial signaling of an intrusion. The primary function of a host-based detection system is to identify and report anomalies first, allowing for informed decision-making on how to address the detected issues.