Will something like this work and be secure enough. The only reason I am using VLAN on unmanged switch is to direct traffic to different gateways operating like client bridge (no dhcp) and send traffic on the the only spare Ethernet interface available and only cable limitation going to different parts of the home where the client bridges are located...
http://www.gargcentral.com/files/multi_wan_fooling_vlan.JPG
