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netflow

  • ntopng
    • needs nProbe (non free) to receive NetFlow
    • free netflow2ng exists
  • Akvorado
    • free (AGPL3)
    • high demands (ClickHouse time-series database)
  • ELK Stack
  • ElastiFlow
    • possible to obtain free Basic License:
      • no usage limits - commercial companies also
      • capacity limit - 4000 flow records per second
      • device limit - 25 devices for SNMP polling and trap