The Internet

World Wide Web

Sociology

Sophistication

Network security

Programming language

Software

Computer network

Social science

Computer security

Computer science

Taxonomy (biology)

Botany

Network monitoring

Biology

IEEE Access

Network Security Monitoring (NSM) is a popular term to refer to the detection of security incidents by monitoring the network events. An NSM system is central for the security of current networks, given the escalation in sophistication of cyberwarfare. In this paper, we review the state-of-the-art in NSM, and derive a new taxonomy of the functionalities and modules in an NSM system. This taxonomy is useful to assess current NSM deployments and tools for both researchers and practitioners. We organize a list of popular tools according to this new taxonomy, and identify challenges in the application of NSM in modern network deployments, like Software Defined Network (SDN) and Internet of Things (IoT).

Present and Future of Network Security Monitoring