Attacks and malware
What is DDoS?
Distributed denial of service: flooding a website or service with traffic from many sources so real users cannot reach it.
A distributed denial of service attack floods a target with traffic or requests from many machines at once, until it slows down or stops responding to legitimate users. The traffic often comes from botnets or from abused servers that amplify it.
DDoS is used for extortion, protest and distraction during other attacks. Mitigation usually relies on upstream providers and content delivery networks that can absorb or filter the traffic.