Free !new! Netflow Monitor -

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

flow monitor MY_MONITOR record netflow ipv4 original-input exporter MY_EXPORTER free netflow monitor

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. ip flow-export source Loopback0 ip flow-export version 9

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. No other free tool matches its threat-hunting workflow

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.