Netflow Tools ((link)) < 95% TOP-RATED >

softflowd -D -i eth0 -v 5 -n 192.168.1.100:2055 Receives UDP datagrams, parses, stores to disk/time-series DB.

Edge Router (NetFlow v9) --UDP 2055--> [pmacct collector (Linux VM)] | v Kafka (3 brokers) | +---> ClickHouse (3-node cluster) +---> Elasticsearch (security logs) | v Grafana (dashboards) Kibana (security analysts) ( /etc/pmacct/pmacct.conf ): netflow tools

1. Core Concept: What NetFlow Actually Is NetFlow is a network protocol developed by Cisco for collecting IP traffic information and monitoring network metadata. It is not packet capture (full payload) nor simple SNMP counters (bytes/sec). It is flow-level accounting . softflowd -D -i eth0 -v 5 -n 192

ip flow-cache timeout active 1 # Export every 1 min (active flows) ip flow-cache timeout inactive 15 # Export after 15 sec idle ip flow-cache timeout fast 30 # For TCP FIN/RST : Shorter timers = more exports = higher CPU/network load. Longer timers = delayed visibility. 3. NetFlow Tool Stack Architecture A production NetFlow deployment has four layers : Layer 1: Exporters (Network Devices) Configure routers/switches/firewalls to send NetFlow. It is not packet capture (full payload) nor