Currently - my incoming fibre line is connected to the WAN port on my older ASUS DSL-AC52U. The wifi is disabled as I don't use it. The whole setup is now on an open wall (minor renovations in progress) - with the asus router taking up quite a bit of space.
I was wondering whether it would be possible to remove the ASUS router - plug the incoming fibre to ethernet directly onto my LAN - and run a router/firewall via a docker container, or on my microserver (on the otherside of the house) - or is it best to have some sort of physical disconnect between the networks?

I was wondering whether it would be possible to remove the ASUS router - plug the incoming fibre to ethernet directly onto my LAN - and run a router/firewall via a docker container, or on my microserver (on the otherside of the house) - or is it best to have some sort of physical disconnect between the networks?

when are you putting in the fireplace?