fastnetmon: very fast DDoS analyzer

by ddos · August 17, 2024

FastNetMon

FastNetMon – A high-performance DoS/DDoS load analyzer built on top of multiple packet capture engines (NetFlow, IPFIX, sFLOW, SnabbSwitch, netmap, PF_RING, PCAP).

What can we do? We can detect hosts in our networks sending or receiving large volumes of packets/bytes/flows per second. We can call an external script to notify you, switch off a server, or blackhole the client.

To enable sFLOW, simply specify the IP of the server running FastNetMon and specify (configurable) port 6343 To enable NetFlow, simply specify the IP of the server running FastNetMon and specify (configurable) port 2055

What is a “flow” in FastNetMon terms? It’s one or multiple UDP, TCP, or ICMP connections with unique src IP, dst IP, src port, dst port, and protocol.

Features

Complete BGP Flow Spec support, RFC 5575
Process and distinguish incoming and/or outgoing traffic

Trigger block/notify script if an IP exceeds defined thresholds for packets/bytes/flows per second
Thresholds can be configured per-subnet with the hostgroups feature
Announce blocked IPs via BGP to routers with ExaBGP

GoBGP integration for unicast IPv4 announcements (you need build support manually).
Full integration with Graphite and InfluxDB
API (you need build support manually)

Redis integration
MongoDB integration
Deep packet inspection for attack traffic

netmap support (open source; wire speed processing; only Intel hardware NICs or any hypervisor VM type)
SnabbSwitch support (open source, very flexible, LUA drove, very-very-very fast)
Filter NetFlow v5 flows or sFLOW packets with LUA scripts (useful for excluding particular ports)