This guide provides proactive steps for election officials and technology providers to reduce the likelihood and impact of denial-of-service (DoS) incidents. It addresses both malicious Distributed Denial-of-Service (DDoS) attacks and non-malicious service interruptions, such as those caused by high volumes of legitimate internet traffic. The document details how to prepare by coordinating with service providers and monitoring network traffic, and how to respond by identifying the issue, reporting attacks (to CISA, FBI, and EI-ISAC), and using alternative methods for sharing public information. It also stresses the importance of developing communications plans and including DoS scenarios in continuity planning and training exercises.
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