I can not log into this TS-230
Open a ticket with QNAP
If you know the old MAC Adress (sticker on the back)
You can reset it yourself (if the NAS still connects via that LAN port)
Login via SSH as admin and do:
hal_app –se_sys_set_mac obj_index=0,value=0A:1B:2C:3D:4E:5F
(where 0A:1B:2C:3D:4E:5F is the actual MAC address of your device from the sticker)
I had this same thing happen on my TS-230.
It required remote-access by QNAP tech support to run some software on the NAS to re-program the MAC back into the mainboard.
Without this programming, the MAC will need to be reset after each bootup.
So the ticket is probably still the best idea
I agree. 