The Gateway is typically deployed on a host in a network zone that has outbound internet access and inbound access from the HST Server instances. The connectivity between the HST Server and the Gateway is secured using mutually authenticated SSL. By default, TCP port 9450 is used to register HST Server instances with the Gateway. After initial registration, TCP port 9451 is used for the authenticated API communication between the HST Server and the Gateway. Both the registration and API communication ports are configurable in the Gateway’s hst-gateway.ini file.

Outbound connections from the Gateway to the external Hortonworks SmartSense Analysis environment use SFTP to transmit bundles to Hortonworks. Specific connectivity details for the SmartSense environment are outlined in the following section: SmartSense Ports & Traffic Flow.