the place of hotspot in the network

hi every body?
i have just setup hotspot on 750gl, my question is that can hotspot server be placed after a router, i mean the users face a router at first then they wil go through hotspot? is that situation possible?

as the hotspot server deals with the users mac address i think a layer2 connection between both is needed. you could use some layer2 tunnel if you need to have the hotspot server at a different place