IT WORKS ! for aussie broadband it goes like this:
set as server / gateway mode
select dhcp (send username & password)
but set no user or password
let the config complete & reboot on its own
ethernet cable from your preferred server nic to the nbn ncd
then RESET THE FTTC NCD from the ABB app
might take a few minutes the FIRST TIME to get going, but server reboots after that are quick as usual
about the ABB FTTC:
ethernet WAN, dynamic, dhcp, ipoe, no user or pass, no vlan.