Sure: Netflow is being used on networking equipment to showtraffic going over it. It's a combined architecture with three components: Flow exporter: aggregates packets into flows and exports flow records towards one or more flow collectors. Flow collector: responsible for reception, storage and pre-processing of flow data received from a flow exporter. Analysis application: analyzes received flow data in the context of intrusion detection or traffic profiling, for example. The exporter is typically a switch, router, firewall or loadbalancer. Flow data consists (at least) of Ingress interface Source IP address Destination IP address IP protocol Source port for UDP or TCP, 0 for other protocols Destination port for UDP or TCP, type and code for ICMP, or 0 for other protocols IP Type of Service So basically, you're leveraging information that's available directly within the network to see what's going on in your environment.
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