Manual Chapter : About Behavioral DoS protection
Applies To:Show Versions
BIG-IQ Centralized Management
About Behavioral DoS
Behavioral DoS(BADoS) provides automatic protection against DDoS attacks by analyzing traffic behavior using machine learning and data analysis. Working together with other BIG-IP DoS protections, Behavioral DoS examines traffic flowing between clients and application servers in data centers, and automatically establishes the baseline traffic/flow profiles for Layer 7 (HTTP) and Layers 3 and 4.
For example, in the case of a DDoS attack from a botnet, each request may be completely legal but many requests all at once can slow down or crash the server. Behavioral DoS can mitigate the attack by slowing down the traffic no more than necessary to keep the server in good health.
Behavioral DoS continuously monitors server health and loading, by means of a customer feedback loop, to ensure the real-time correlations, and validate server conditions, attacks, and mitigations. Any subsequent anomalies are put on watch, and the system applies mitigations (slowdowns or blocks) as needed.
This is how Behavioral DoS works:
- Learns typical behavior of normal traffic
- Detects an attack based on current conditions (server health)
- Finds behavior anomaly (what and who changed to cause congestion?)
- Mitigates by slowing down suspicious clients
- Improves with experience
You enable Behavioral DoS, which requires minimal configuration, in a DoS profile in the Stress-based detection settings. Because the system is tracking the traffic data, it adapts to changing conditions so there are no thresholds to specify. You set the level of mitigation that you want to occur, ranging from no mitigation (learning only) to aggressive protection (proactive DoS protection). The system can quickly detect Layer 7 DoS attacks, characterize the offending traffic, and mitigate the attack.
You can use a DoS profile that has Behavioral DoS enabled to protect one or, at most, two virtual servers.