On Wednesday 16 March 2022 at 07:23 UTC, a CLDAP reflection targeted a gaming community customer in Central Europe. The attack peaked at 163.0 Gbps and lasted 73 minutes. Traffic originated from 1833 autonomous systems in 7 countries, predominantly misconfigured open reflectors.
| Vector | CLDAP reflection |
| Peak | 163.0 Gbps |
| Duration | 73 min |
| Time to mitigation | 0.706 s |
| Attack traffic reaching origin | 0.019% |
| Legitimate traffic challenged | 0.74% |
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 27 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
- Keep origin IPs out of public DNS history.
- Enable log streaming to your SIEM for faster correlation.
- Enable authenticated origin pulls.