Multiple nics on debian gateway server

Hi there,

my debian server has multiple NICS and acts as a dhcp and firewall.
And this is where home assistant should run on.

eth0 goes to the internet.
eth1 is dhcp for the the local network.

I just installed Home Assistant and it seems to be only scanning eth0. So no devices are being found.

home can i assign Home Assistant to only use eth1?

thanks for the help.

-Dennis