@TheSven Indeed the bridge mode would be better instead of DMZ.
@Xydocq Thanks for the screen. Sadly I don’t the Modem mode. It’s strange since once I do ip address check on e.g. whatsmyip I see my ipv4 already and no ipv6 (yesterday before the switch I saw for sure only ipv6).
Once I do the Network diagnostic tool in the modem I got:
What’s worrying is the IPv6 gateway is valid.
Do I need to wait a little bit more? Or maybe the router?