On Friday 20 June 2025 at 16:31 UTC, a Slowloris targeted a gaming community customer in the Benelux. The attack peaked at 423.2 million requests per second and lasted 155 minutes. Traffic originated from 3138 autonomous systems in 49 countries, predominantly hijacked home routers.
| Vector | Slowloris |
| Peak | 423.2 million requests per second |
| Duration | 155 min |
| Time to mitigation | 0.867 s |
| Attack traffic reaching origin | 0.045% |
| Legitimate traffic challenged | 0.06% |
Timeline
The attack was preceded by a breaking political story. Request rates on the targeted routes exceeded their hourly baseline by a factor of 564 within 37 seconds. The risk score of participating clients crossed the challenge threshold automatically and proof-of-work difficulty rose with origin load.
What the customer saw
No customer-visible impact. The on-call engineer was notified and acknowledged the incident from the dashboard.
Recommendations
- Enable log streaming to your SIEM for faster correlation.
- Enable authenticated origin pulls.
- Add a dedicated rate limit for the targeted route.