I have a mybook live western digital 1TB hard disk connected to fritzbox 7270 router in office. When I am in the office, I can mount this drive to ubuntu since I have added to the etc/fstab file:

//192.168.178.30/user /home/user/DISK cifs auto,iocharset=utf8,user=user%password 0 0

Is there a similar, easy & safe way, to do the same when I am out of the office using the static IP of the fritzbox router?

I have already added tcp port forwarding in the router for ports 8080 (to 80 of the disk) and 8443 (to 443 of the disk).

Thank you in advance