On Thursday 26 March 2026 at 19:01 UTC, a GRE flood targeted a education platform customer in the Benelux. The attack peaked at 98.6 Gbps and lasted 71 minutes. Traffic originated from 2221 autonomous systems in 35 countries, predominantly residential proxy networks.
| Vector | GRE flood |
| Peak | 98.6 Gbps |
| Duration | 71 min |
| Time to mitigation | 0.490 s |
| Attack traffic reaching origin | 0.087% |
| Legitimate traffic challenged | 0.18% |
Timeline
The attack was preceded by no stated motive. Edge packet filters identified the flood by source port and payload signature and dropped it at line rate across 18 points of presence.
What the customer saw
No customer-visible impact. The on-call engineer was notified and acknowledged the incident from the dashboard.
Recommendations
- Review allow-listed partner ranges quarterly.
- Lower challenge thresholds on authentication endpoints during high-risk events.
- Enable log streaming to your SIEM for faster correlation.