ECS > Structures > ManagedSecurityGroup ManagedSecurityGroup¶ Structure Class¶ ManagedSecurityGroup dataclass ¶ Bases: _SerdeShape A security group associated with the Express service. Attributes¶ arn class-attribute instance-attribute ¶ arn: str | None = ... The ARN of the security group. status instance-attribute ¶ status: str The status of the security group. status_reason class-attribute instance-attribute ¶ status_reason: str | None = ... Information about why the security group is in the current status. updated_at instance-attribute ¶ updated_at: datetime The Unix timestamp for when the security group was last updated.