A method for accessing network services from external networks includes receiving at a cloud-based server a bridge setup request from a private communication system, establishing a bridge connection between the cloud-based server and the private communication system, establishing a communication path between the cloud-based server and a cloud-based application, receiving a request from a cloud-based entity that is directed to an enterprise service hosted within the private communication system, transmitting the request to the enterprise service over the bridge connection, receiving a response from the enterprise service over the bridge connection, and transmitting the response to the cloud-based entity. Related computer program products and systems are also disclosed.