[Part of the series of blog postings on Netflow] Netflow is a network protocol invented by Cisco that provides granular visibility on network utilization. Routers and switches send (“export”) Netflow datagrams that summarize traffic through them to a Netflow Collector program that displays the data. This gives visibility into “who’s using the network?” Virtually all…

[Part of the series of blog postings on Netflow] A lightweight Netflow collector and web display based on NFSEN/NFDUMP in a Docker container. NFSEN and NFDUMP are documented and hosted at SourceForge.net This container listens on ports 2055, 4739, 6343, and 9666 for netflow, ipfix, and sFlow exports. It displays the collected data in a…