The detection rule "Tailscale Magic DNS Disabled" is designed to alert security operations when a user disables Magic DNS settings within the Tailscale service in an organization's tenant. Magic DNS is critical for ensuring that DNS resolutions can take place securely within the Tailscale network, and disabling it may expose the organization to potential security vulnerabilities, including misconfiguration and unauthorized access. The rule generates alerts when specific actions are logged indicating that a user (in this case, Homer Simpson) has disabled the Magic DNS feature through the Tailscale Admin Console. The configuration logs track the time, user actions, and corresponding system events. The maximum allowed threshold for the detection is set to one occurrence within a 60-minute deduplication period, ensuring timely responses to potential security breaches while reducing unnecessary noise. Security teams are advised to investigate any alerts at high severity immediately and determine if the disablement was conducted for valid business reasons, considering re-enabling the feature to maintain the security of the organization's network.