NBD for SC101 / SC101T / sc101-nbd

Hi,

How can NBD module be added?

modprobe nbd
modprobe: FATAL: Module nbd not found in directory /lib/modules/4.14.173-ipfire

I need it for a SAN:

SC101(T) is a NAS build by Netgear under ZSAN licence.
Google code does provide sc101-nbd drivers for it.

The ut utility works fine on i586 but I can’t find the NBD module to use it

Thanks!
H&M