If you are running an SFTP-based gateway and SmartSense version 1.3.0 or newer, we recommend that you upgrade to HTTPS-based gateway.

You can do this by setting the property smartsense.upload.provider.type to HTTPS in gateway configuration and refer to this Knowledge Base article for the HTTPS user name, password, host, and port details: https://support.hortonworks.com/s/article/SmartSense-Gateway-setup.