Adequate capacity to ensure availability is maintained.

The organization should Implement measures to secure the organization’s critical systems from Denial-of-Service (DoS) attacks, or at least limit their impact. These could include:

• Reviewing current system vulnerabilities
• Deploying DoS mitigation solutions such as firewalls, intrusion detection systems, and traffic filtering
• Using cloud-based DoS protection services
• Configuring rate limiting and monitoring traffic patterns for anomalies
• Developing a response plan to quickly react to and mitigate the effects of DoS attacks.

The operation of information systems may depend on certain key resources, such as server capacity, file storage capacity, data processing capacity, monitoring capacity or certain key persons.

In particular, some of these resources may have long delivery times or high costs in certain situations, in which case special attention must be paid to future capacity problems with them.

We monitor the use of key system resources and identify trends, potential security bottlenecks and dependencies on important people.

Often, security tools provide a way to set alert policies when something potentially dangerous happens in an organization's environment. For example, Microsoft 365 has built-in alert policies to alert you to abuse of administrator privileges, malware, potential internal and external risks, and data security risks.

The organization must identify security-related events in data systems and the environments in which they operate. To respond to changes related to these events, alarm policies must be created.

Alarm policies need to be actively monitored and modified based on experience.