The present document present an analysis of the security mechanisms that could be supported in the customer environment (Customer Network Gateway or Customer Devices) with reference to the overall end to end security architecture for the NGN defined by WG7. As examples, these mechanisms can be related to authentication (for connectivity and for services), firewalling and network access/parental control, virus protection, intrusion detection, Anti Spam capabilities. The activity will be performed in close relationship with WG7. The reactions to threats or the protections against threats described in the present document will involve only the CPN, not the external network