Description

Ensure an Events Service rule in the root compartment watches for security list changes and has an action that sends a notification to a monitored topic. The rule should match all of the related event types, so the security team is alerted as soon as these changes happen.

Rationale

Security lists control which network traffic can reach resources. An unauthorized or accidental change, such as opening a port to the internet, can expose systems within seconds. Alerting on every security list change lets the team review it quickly and undo harmful changes before they are exploited.

Impact

  • The security team is alerted when a security list is created, changed, moved, or deleted

  • Speeds up detection of unauthorized or accidental changes

  • Alert volume depends on how often these changes happen

Default Value

By default, no event rules or notification topics are configured.

Pre-Requisites

  • Permission to manage cloudevents-rules and ons-topics in the root compartment

  • A notification topic with at least one confirmed subscription (for example, the security team's email address)

Test Plan

  1. Sign in to the OCI Console at https://cloud.oracle.com.

  2. Open the navigation menu, select Observability & Management, and under Events Service select Rules. In the Compartment filter, select the root compartment (tenancy).

  3. Look for an enabled rule whose conditions match the Networking service and these event types: Security List – Change Compartment, Security List – Create, Security List – Delete, and Security List – Update.

  4. Open the rule and verify that its Actions include a Notifications action pointing to a topic with an active subscription.

  5. If no such rule exists, or it has no notification action, follow the implementation steps.

Implementation Steps

  1. Sign in to the OCI Console at https://cloud.oracle.com.

  2. If you do not have a topic, open Developer Services > Application Integration > Notifications, select Create topic, then create a subscription (for example, Email) and confirm it.

  3. Open the navigation menu, select Observability & Management, and under Events Service select Rules. In the Compartment filter, select the root compartment (tenancy).

  4. Select Create rule and enter a name, for example notify-on-security-list-changes.

  5. Under Rule conditions, choose Event type, select Service name Networking, and select the event types: Security List – Change Compartment, Security List – Create, Security List – Delete, and Security List – Update.

  6. Under Actions, choose Action type Notifications, and select the compartment and topic.

  7. Select Create rule.

Backout Plan

  1. Sign in to the OCI Console at https://cloud.oracle.com.

  2. Open the navigation menu, select Observability & Management, and under Events Service select Rules. In the Compartment filter, select the root compartment (tenancy).

  3. Select the rule and select Disable, or delete the rule.

Reference