This article will guide you on how to disable SSH password authorization from WHM, by doing this you restrict unwanted access to server by any attacker. You can enable key based authentication to server and access the server with the SSH key.
1. Login to your WHM with the username and password provided.
2. Under the Home page select the Security Center option
3. Click on SSH Password Authorization Tweak under the Security Center page
4. Click on the Disable Password Auth to disable SSH Password Authorization