DDoS Attack
Definition
A DDoS attack (Distributed Denial of Service) floods a server, network or service with traffic from many sources simultaneously, making it unavailable to legitimate users.
In a DDoS attack, thousands to millions of compromised devices (a botnet) are deployed simultaneously to overwhelm a target with network traffic. This can take down a website, API, DNS server or other critical service.
Attacks range from volumetric (overwhelming bandwidth) to application-layer attacks (HTTP floods). The impact can range from temporary disruptions to millions of euros in damage per hour.
Protection against DDoS involves traffic scrubbing, anycast networks, rate limiting and specialised anti-DDoS services. DEFION also offers DDoS tests to measure the resilience of your infrastructure.