The GCP Compute SSH Connection detection rule is designed to monitor and log all SSH connections made to Google Cloud Platform (GCP) Compute Instances. It helps enhance the security posture by identifying potential unauthorized access attempts or misconfigurations in SSH access. The rule is triggered by events logged in GCP's Audit Logs, specifically those related to actions such as IAP SSH connections, OS Login access without MFA, connections from GCP Console, and more. Each test checks for specific criteria, such as whether the connection originated from authenticated users and if certain best practices (like the use of Multi-Factor Authentication) are followed. The rule is categorized as 'Info' severity and will generate alerts for detected SSH connections, aiding administrators in maintaining visibility over access to their compute resources.