In an effort to increase security of our website, I'm reading up on Gazzang zNcrypt, which claims to protect data in databases from breaches.
Technically, it seems to do filesystem encryption. As far as I know, this is effective against hackers gaining physical access to the harddisk. If hackers manage to login to the DB, SSH, FTP, website or any higher level, they'd just see the decrypted data without effort.
Are these assumptions correct as to the level of security provided by zNcrypt?