Efficient packet dropping is a key part of Cloudflare’s distributed denial of service (DDoS) attack mitigations. In this post, we introduce a new tool in our packet dropping arsenal: L4Drop.
The rise of multivector DDoS attacks
It's been a while since we last wrote about Layer 3/4 DDoS attacks on this blog. This is a good news - we've been quietly handling the daily onslaught of DDoS attacks. Since our last write-up, a handful of interesting L3/4 attacks have happened. Let's review them.
How to drop 10 million packets per second
Internally our DDoS mitigation team is sometimes called "the packet droppers". When other teams build exciting products to do smart things with the traffic that passed through our network, we take joy in discovering novel ways of discarding it.
초당 천만개의 패킷을 버리는 방법
사내에서 DDoS 대응팀은 종종 "패킷 버리는 사람들"이라 불립니다. 다른 팀이 우리 네트워크를 통해 지나가는 트래픽으로 스마트한 일을 하며 신나할 때 우리는 그걸 버리는 여러가지 방법을 찾아가며 즐거워 합니다.
Rate Limiting: Delivering more rules, and greater control
With more and more platforms taking the necessary precautions against DDoS attacks like integrating DDoS mitigation services and increasing bandwidth at weak points, Layer 3 and 4 attacks are just not as effective anymore.