Free Netflow Monitor Free -

Plixer’s Scrutinizer is the gold standard. The free version is limited to and keeps data for 5 hours of raw detail (aggregated views go back 30 days). For most SMBs and labs, 10k fps is huge.

ip flow-export source Loopback0 ip flow-export version 9 ip flow-export destination 192.168.1.100 2055

It runs best on a dedicated VM (Windows or Linux). The interface is powerful but has a 2010-era learning curve. 2. ntopng (Community Edition) Best for: Real-time visibility and edge monitoring. free netflow monitor

You don’t need a six-figure budget to see what’s eating your bandwidth. If you have a router or switch that exports NetFlow, IPFIX, sFlow, or jFlow, you’re already sitting on a goldmine of traffic data. The only missing piece is a free NetFlow monitor to collect and analyze it.

On pfSense/OPNsense: Services > NetFlow > Enable + set collector IP. On Ubiquiti UniFi: System > Advanced > NetFlow Export (IP + Port 2055). Before you build a whole stack, point your router’s NetFlow export to a laptop running ntopng in a Docker container : Plixer’s Scrutinizer is the gold standard

The security investigation tools. You can drill from “High UDP traffic” straight into a flow grid, apply a filter for “Deny” actions, and pivot to a geo-map. No other free tool matches its threat-hunting workflow.

ElastiFlow is an open-source template that turns Elasticsearch into a NetFlow collector. You bring the servers, it brings the network analytics. ip flow-export source Loopback0 ip flow-export version 9

flow monitor MY_MONITOR record netflow ipv4 original-input exporter MY_EXPORTER