DHCP & Wireless Ethernet Bridge

Hi Folks,

Recently switched from DDWRT to Adv Tomato on the R7000.
I'm trying to setup a wireless bridge from the R7000 to my 4G modem (upstairs).

All works good doing the default settings. I can also connect using a virtual wireless interface which is something I could never get working in DDWRT.

However...

My 4G modem is a bit stupid as you can imagine.

I want to be able to use Tomato as the DHCP and DNS server and just route through the modem using wireless bridge.

Is this even...

DHCP & Wireless Ethernet Bridge