The ServiceNow MID server communicates with the Ironstream service over a TCP/IP port. Follow these steps to define the port for this connection, and define a security key on the MID server to be used by Ironstream when forwarding information to ServiceNow. You must choose the correct authentication based on your ServiceNow release. For Tokyo and later, you must use API based authentication. For more information, see API Authentication. For older releases you can follow the steps here.