On Monday 19 September 2022 at 07:07 UTC, a CLDAP reflection targeted a online payments customer in Iberia. The attack peaked at 227.8 Gbps and lasted 59 minutes. Traffic originated from 1743 autonomous systems in 52 countries, predominantly hijacked home routers.
| Vector | CLDAP reflection |
| Peak | 227.8 Gbps |
| Duration | 59 min |
| Time to mitigation | 0.818 s |
| Attack traffic reaching origin | 0.018% |
| Legitimate traffic challenged | 0.59% |
Timeline
The attack was preceded by a breaking political story. Edge packet filters identified the flood by source port and payload signature and dropped it at line rate across 14 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.
- Enable authenticated origin pulls.
- Enable log streaming to your SIEM for faster correlation.