The Cybersecurity and Infrastructure Security Agency (CISA), the Federal Bureau of Investigation (FBI), and the Multi-State Information Sharing and Analysis Center (MS-ISAC) have issued joint recommendations for defending against distributed denial-of-service (DDoS) attacks.
Denial-of-service (DoS) attacks are a type of cyberattack that target websites or applications with the goal of depleting the resources of the target system to make it inaccessible to authorized users. DDoS attacks may target server vulnerabilities in an effort to overwhelm network resources or to consume these resources by reflecting a significant amount of network traffic to the target.
They may also make an effort to overload the target’s connection (protocol) or application (compute or storage) resources. A DDoS attack is one where the overloading traffic comes from multiple sources working together.