Passive Network Monitoring
Tenable Nessus® Network Monitor (NNM), a passive monitoring sensor, continuously discovers active assets on the network and assesses them for vulnerabilities. NNM is based on patented network discovery and vulnerability analysis technology that continuously monitors and profiles non-intrusively. It monitors IPv4, IPv6 and mixed network traffic at the packet layer to determine topology, services and vulnerabilities. Nessus Network Monitor serves as an integrated component of Tenable.io®, Industrial Security™ and Tenable.sc™ (formerly SecurityCenter), enabling full visibility into traditional and modern assets.