The router is basic: almost no protection function is proposed (other than the wireless encryption and MAC white list). But hey, that's enough for a home network. And we should not see it as a router, but as a WiFi switch "secure".
A function allows to create a "guest" network that gives access gateway, but not the rest of the network. Always practice.
As this is not a real router, the internet box can either be connected directly to a LAN port (which I did) or on a remote Dlan.