well you have network connectivity issue, so if you do not describe your network extensively ( what is on wan side of sme is it a modem or another LAN, what is on LAN side and what is the subnet… ) you are on you own.
Also be more precise on what is not working. “THings on the lan are still thought of as not local.” is not specific and is an interpretation, not what you see.
trying to access from lan side of sme to samba i get error x
trying to access from wifi behind another router with another subnet i get http error YYY.