Mount .iso File on FreeBSD

Create folder if it doesn’t exist:

# mkdir /mnt/cdrom

Create memory disk device:

# mdconfig -a -t vnode -f file.iso -u 0

There will be /dev/md0 device.
Mount device md0:

# mount -t cd9660 /dev/md0 /mnt/cdrom
Finish.
To unmount:

# umount /mnt/cdrom
# mdconfig -d -u 0