NDMP, or Network Data Management Protocol, is a protocol meant to transport data between network attached storage (NAS) devices and backup devices. This removes the need for transporting the data through the backup server itself, thus enhancing speed and removing load from the backup server.
From Wikipedia.
Default port: 10000
PORT STATE SERVICE REASON VERSION
10000/tcp open ndmp syn-ack Symantec/Veritas Backup Exec ndmp
nmap -n -sV --script "ndmp-fs-info or ndmp-version" -p 10000 <IP> #Both are default scripts
ndmp