FastNetMon DDoS detection tool

Key features

open source

Completely open and transparent development process. Follow us at GitHub!

fast detection

Detects DDoS attack in 2 seconds

BGP support

Complete support for BGP v4 and BGP flow spec (RFC 5575). Tested compatibility with Cisco, Juniper, A10 Networks, Extreme, Brocade, Mikrotik.

Any protocol

– NetFlow v5, v9
– sFLOW v4, v5
– Port mirror/SPAN


FastNetMon is a very high performance DDoS detector built on top of multiple packet capture engines: NetFlow, IPFIX, sFLOW.

It could detect malicious traffic in your network and immediately block it with BGP blackhole or BGP flow spec rules.

It has solid support for all top network vendors and has unlimited scalability due to flexible design.

You could integrate FastNetMon into any existing network without any changes and additional hardware!

FastNetMon Community licensed under GPLv2 terms and has very strong community around it.

  • %
    Free and open source

  • happy users

  • countries
  • Gbps
    peak performance

Client Testimonials

What our customers are saying about us

Latest news