CloudFlare's I'm Under Attack Mode (IUAM) is elegantly simple. When a site is under an application layer (Layer 7) distributed denial of service (DDoS) attack, the mode will return a challenge page to a visitor. The challenge requires the visitor's browser to answer a
Yesterday I posted a post mortem on an outage we had Saturday. The outage was caused when we applied an overly aggressive rate limit to traffic on our network while battling a determined DDoS attacker.
CloudFlare provides a broad level of protection from a wide range of attacks. We do this while minimizing false positives or annoyances to legitimate customers. CloudFlare didn't begin as a DDoS mitigation service, but we've rapidly found that we are good at it.