mounting fritz.box mounted usb drive to raspberry pi

Hello xperts,
I try to connect usb mount hard disc to a raspberry pi using following command:
Testing the connection with:
sudo mount -v -t nfs 192.168.178.1:/fritz.nas/SHARE /home/pi/mnt -o nfsvers=3,domain=WORKGROUP,username=USER,password=PASSWORD

I get the following response:

mount.nfs: prog 100003, trying vers=3, prot=6
mount.nfs: portmap query retrying: RPC: Unable to receive
mount.nfs: prog 100003, trying vers=3, prot=17
mount.nfs: portmap query failed: RPC: Unable to receive - Connection refused

Connection to a windows 10 PC does work

Doing it via fstab also does not work.

Any ideas?
Thanks,
Carl

 

Is the /fritz.nas/SHARE directory exported?
If it is, try mounting with no extra options.

 

Yes all directories are exported, if exported means Shared in Fritz.Box (Fritz!Nas view)

 

I know nothing about Fritz.Box.
What shows

Code:

# showmount -e 192.168.178.1 

If it shows nothing, then the share is not exported for NFS, and your NFS mount must fail.