Netflow Analyzer Open Source <2026 Update>

| Feature | NfSen | ntopng | ELK Stack | |---------|-------|--------|-----------| | License | GPLv2 | GPLv3 (CE) | Apache 2.0 | | Flow/s (max typical) | ~50k | 1k (CE) | 100k+ (with tuning) | | Real-time dashboard | No | Yes | Yes (via Kibana) | | Historical query speed | Fast (binary) | Slow (RRD) | Fast (indexed) | | Alerting | Basic (email) | Advanced (scriptable) | Via ElastAlert | | Setup difficulty | Easy | Moderate | Hard |

Open-source NetFlow analyzers offer several advantages: netflow analyzer open source

Edit the configuration file ( etc/nfsen.conf ) to match your system: | Feature | NfSen | ntopng | ELK

Real-time monitoring and ease of use.