On Tuesday 18 February 2025 at 10:34 UTC, a GRE flood targeted a video streaming customer in the UK. The attack peaked at 124.2 Gbps and lasted 14 minutes. Traffic originated from 1401 autonomous systems in 40 countries, predominantly mobile carrier ranges.
| Vector | GRE flood |
| Peak | 124.2 Gbps |
| Duration | 14 min |
| Time to mitigation | 0.068 s |
| Attack traffic reaching origin | 0.060% |
| Legitimate traffic challenged | 0.29% |
Timeline
The attack was preceded by a competitor’s product launch. Edge packet filters identified the flood by source port and payload signature and dropped it at line rate across 33 points of presence.
What the customer saw
Checkout conversion was unchanged compared with the same hour of the previous week.
Recommendations
- Enable authenticated origin pulls.
- Review allow-listed partner ranges quarterly.
- Lower challenge thresholds on authentication endpoints during high-risk events.