FastNetMon provides high-performance DDoS detection at the network layer, enabling organisations to identify and respond to L3 and L4 attacks in real time. It is designed for service providers, data centres, cloud operators and enterprises that require fast, accurate visibility into network traffic and automated response to volumetric threats.
By analysing traffic telemetry directly from network infrastructure, FastNetMon detects abnormal behaviour within seconds and provides the intelligence required to trigger mitigation actions before services are disrupted.
Why DDoS Detection Matters
DDoS attacks target network availability by overwhelming links, devices or services with malicious traffic. Even short disruptions can result in:
- Downtime of critical applications and services
- Breaches of SLAs and contractual obligations
- Loss of customer trust and revenue
- Increased operational and recovery costs
As networks grow in size and complexity, manual monitoring is no longer sufficient. Effective DDoS protection starts with fast, reliable detection at the network level.
Near-Instant DDoS Detection
FastNetMon is designed for rapid detection of abnormal traffic patterns associated with DDoS attacks. Detection speed depends on the telemetry source:
- sFlow and SPAN / port mirroring: detection in as little as 1–2 seconds
- NetFlow v5/v9 and IPFIX: typically 5–30 seconds
This near-real-time detection enables operators to respond quickly to attacks, reducing both impact and response time.
How FastNetMon Detects DDoS Attacks
FastNetMon ingests traffic telemetry from routers, switches and virtual networks using standard, widely supported methods:
- sFlow
- NetFlow v5 / v9
- IPFIX
- SPAN / port mirroring
- Cloud flow logs (e.g. AWS and Google Cloud)
Traffic is analysed continuously to establish a baseline of normal behaviour. FastNetMon detects anomalies by monitoring changes in:
- Bandwidth utilisation
- Packets per second (PPS)
- Flow count
Detection thresholds are fully configurable, allowing engineers to tune sensitivity based on network characteristics and historical attack patterns.
DDoS Attack Types Detected
FastNetMon detects a wide range of common and complex DDoS attack vectors, including:
- UDP, TCP and ICMP flood attacks
- TCP protocol attacks such as SYN, SYN-ACK and FIN floods
- Fragmentation-based IP protocol attacks
- Amplification and reflection attacks (e.g. DNS, NTP, SSDP, SNMP, GRE)
- Multi-vector attacks combining multiple techniques
The detection engine is implemented in high-performance C++ and is designed to operate at scale without introducing latency or packet loss.
Scalable by Design
FastNetMon is built for high-throughput environments and can scale from small enterprise networks to large service provider backbones.
- Supports millions of flows per second per server
- Scales linearly by adding additional instances
- Runs on standard commodity hardware or virtual machines
- Supports both IPv4 and IPv6 networks
This makes FastNetMon suitable for networks where traffic volumes and attack sizes continue to grow.
From Detection to Mitigation
Detection is the foundation of effective DDoS defence. Once an attack is detected, FastNetMon can automatically trigger mitigation workflows using standard network mechanisms, including:
- BGP BlackHole / RTBH
- BGP FlowSpec filtering
- Scrubbing centre traffic diversion
- Blocklist-based filtering
These mitigation methods are configured separately and activated only when detection thresholds are exceeded, giving operators full control over how attacks are handled.
Designed for Network Engineers
FastNetMon gives network teams full visibility and control over detection and response:
- Configurable detection thresholds per host, subnet or protocol
- Integration via REST API, scripts and webhooks
- Export of metrics to external systems (e.g. Grafana, ClickHouse, InfluxDB)
- CLI-based configuration designed for operational workflows
No proprietary hardware or vendor-specific dependencies are required.
Who Uses FastNetMon for DDoS Detection
FastNetMon is used globally by organisations that rely on network availability, including:
- ISPs and telecom operators
- Data centres and hosting providers
- Cloud and hybrid infrastructure operators
- Enterprises with high-value online services
Customers in more than 140 countries rely on FastNetMon to detect and respond to DDoS attacks at the network scale.
Get Started with FastNetMon DDoS Detection
FastNetMon provides fast, accurate and scalable DDoS detection as the foundation of a complete network-level defence strategy.
You can evaluate FastNetMon with a free trial and see how it fits into your existing network and operational model.
Start your free trial or explore pricing options to learn more.