An approach is provided for performing cloud based computer network security services. Data traffic from a plurality of networks corresponding to a plurality of subscribers are received. Data traffic is routed to a security platform over a communication path to one or more service aggregators to process the data traffic according to one or more security services performed by the security platform. The security services are provided as a managed service by a service provider. The processed data are received from the one or more service aggregators, and routed to the corresponding one of the networks.