Community Edition

FastNetMon - A high performance DoS/DDoS load analyzer built on top of multiple packet capture engines (NetFlow, IPFIX, sFlow, AF_PACKET, Netmap, PCAP).

What do we do?

We detect hosts in the deployed network sending or receiving large volumes of traffic, packets/bytes/flows, per second and perform a configurable action to handle that event. These configurable actions include notifying you, switching off the server, or blackholing the client.

Flow is one or more ICMP, UDP, or TCP packets which can be identified via their unique src IP, dst IP, src port, dst port, and protocol fields.

Project

Official site
FastNetMon Advanced, Commercial Edition
FastNetMon Advanced and Community difference table
Detailed reference: link

Supported packet capture engines

NetFlow v5, v9
IPFIX
v4, v5
PCAP
AF_PACKET
Netmap
SnabbSwitch (experimental)
PF_RING / PF_RING ZC (obsoleted, not recommented, please use AF_PACKET instead)

You can check out the comparison table for all available packet capture engines.

Official support groups:

Mailing list
Slack
IRC: #fastnetmon at irc.freenode.net web client
Telegram: fastnetmon

Complete integration with the following vendors

Features

Detects DoS/DDoS in as little as 1-2 seconds
Scales up to terabits on single server (sFlow, Netflow, IPFIX) or to 40G + in mirror mode
Trigger block/notify script if an IP exceeds defined thresholds for packets/bytes/flows per second
Complete support for most popular attack types
Thresholds can be configured per-subnet basis with the hostgroups feature
Announce blocked IPs via BGP to routers with ExaBGP or GoBGP
Full integration with Graphite and InfluxDB
API
Redis integration
MongoDB integration
Netmap support (wire speed processing; only Intel hardware NICs or any hypervisor VM type)
Filter NetFlow v5 flows or sFlow packets with LUA scripts (useful for excluding particular ports)
Supports L2TP decapsulation, VLAN untagging in mirror mode
Complete plug-in support
Capture attack fingerprints in PCAP format
Experimental BGP Flow Spec support, RFC 5575