port forward your desired private IP and port to the fixed IP?

if the tm dlink is same with home router, it only have basic port forwarding feature (cannot add wan IP)

so, connect the device to router lan port and set tm wan fixed IP on the device. iinm need to disable NAT at pppoe profile first.

but by doing this, wifi will not work and only device connected to the router only can get internet. need to add secondary router for NAT and dhcp.

get another router like fortinet or mikrotik.

i'm using pfsense btw and this is my settings:

yeah.

you're hosting anything at office?

the firewall/port forwarding section of your new dlink router look like this?

if yes, have you tried entered the one of unifi fixed IP at the remote IP section?