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Filtering and Upstream Mitigation

Traffic filtering begins at the edge with baseline validation and anomaly scoring, then escalates to upstream mitigation when inbound volume or attack distribution exceeds local handling thresholds. This model supports infrastructure resilience by preserving local resources for validated traffic while external scrubbing absorbs large-scale attack volume.

Packet analysis is used to classify attack vectors and tune filter strictness. Overly broad policies can increase false positives and customer impact, especially for workloads with nonuniform traffic patterns. For this reason, mitigation systems are tuned with service-aware thresholds and reviewed against live telemetry.

Routing protection is critical during active mitigation. Route changes should be deliberate and reversible, with explicit measurement of latency effects and loss characteristics after each adjustment. Traffic engineering decisions made during attacks should prioritize routing consistency for legitimate traffic and avoid unnecessary path instability.

See also: Mitigation Philosophy, Network Architecture, and Status & Reliability.