FastNetMon vs nfsen-ng

FastNetMon is an open-source network monitoring tool that analyzes traffic patterns to detect network outages, DDoS attacks, suspicious access to critical systems, and other issues. It works by analyzing netflow, sflow, and mirroring ports on switches.

nfsen-ng is an open-source rewrite and replacement of the popular NetFlow analysis software nfsen. It provides an intuitive web-based interface for analyzing NetFlow and other network flow data in real-time.