All requests sent to the Data Mover REST API must use a host defined in the Data Mover REST Accept Host List. This applies to the Host header and X-Forwarded-Host header. If the values for either header does not match one of the hosts defined in the Accept Host List, the request is rejected. By default, the list contains localhost:1443. Leave this value in the list unless you do not want to accept calls to Data Mover REST using localhost:1443.
In addition to the values in the Accept Host List, Data Mover dynamically looks up the server name and server address of the host where Data Mover REST is running and accepts these values. These values are accepted as server name:1443 and server address:1443. To view the dynamic server name and server address being used, see dmRest.log.