Netflow Free [verified]

In the world of network administration, visibility is paramount. You cannot secure or optimize what you cannot see. For years, the gold standard for network visibility has been NetFlow—a network protocol developed by Cisco that collects active IP network traffic as it enters or exits an interface.

(NSDI '23) – While not purely "NetFlow-free", it shows how to avoid exporting raw NetFlow by doing classification in-network. netflow free

NfSen is perhaps the most well-known open-source NetFlow collector. It is a web-based frontend for the nfdump tools. In the world of network administration, visibility is

While not a traditional NetFlow collector, Prometheus and Grafana can be used together to collect and visualize NetFlow data. (NSDI '23) – While not purely "NetFlow-free", it

Once this is done, your hardware is doing the heavy lifting—caching flow records and shipping them off to your server.