On Friday 28 February 2025 at 09:35 UTC, a CLDAP reflection targeted a electronics retail customer in Central Europe. The attack peaked at 13.5 Gbps and lasted 36 minutes. Traffic originated from 2944 autonomous systems in 92 countries, predominantly hijacked home routers.
| Vector | CLDAP reflection |
| Peak | 13.5 Gbps |
| Duration | 36 min |
| Time to mitigation | 0.245 s |
| Attack traffic reaching origin | 0.086% |
| Legitimate traffic challenged | 0.28% |
Timeline
The attack was preceded by a hacktivist channel announcing the target. Edge packet filters identified the flood by source port and payload signature and dropped it at line rate across 17 points of presence.
What the customer saw
The customer’s status page stayed green throughout; they learned about the attack from our notification.
Recommendations
- Review allow-listed partner ranges quarterly.
- Keep origin IPs out of public DNS history.
- Lower challenge thresholds on authentication endpoints during high-risk events.