Does anyone know of some kind of appliance I can sit in front of my router that will put all the traffic in my house through a VPN? I run OpenWRT, so I think it

Does anyone know of some kind of appliance I can sit in front of my router that will put all the traffic in my house through a VPN? I run OpenWRT, so I think it's possible to do it there, but I think it would be easier to make it it's own thing. Whitelisting would be nice too. Netflix video traffic, for example, would be nice to not put through another hop.