Well,

Based on the information you’ve provided, while the ftp user and password “seem” OK, they’re not okay.

Check the Storage Management Page, specifically the Storage Nodes and select yours.

You should see, under the Management Username and password, the user and password fog is attempting to use to login to FTP.

If you try to access the ftp using the user fog and the password from the aforementioned area, it should let you in, if it doesn’t you likely need to change the Linux FOG User (fog) on your system.