Embodiments are directed towards, gateway computers and management platform server computers for managing secure communication over a network. Gateway computer may intercept communications from unauthenticated source node computers directed to target node computers. If the unauthenticated node computer provides its credentials in response to a request for credentials from the gateway computer, the credentials and the intercepted communications may be provided to a management platform server for further processing. The management platform server may authenticate the unauthenticated source node computer based on its credentials and the intercepted communication and the management platform server may determine a target gateway computer that corresponds to the target node computer based on content of the intercepted communication. The management platform server may provide configuration information for generating a secure private network connection between the gateway computer and the target gateway computer.