R7100LG accès de l'exterieur

> [...] J'ai ouvert le port 1080 de l'exterieur pour acceder à ma box
> domotique et le port 80 en interne.

   "ouvert" how, exactly?  Port forwarding?  What is the actual
port-forwarding rule?  What is the IP address of the "box"?  Is it
reserved or static?

> Je n'arrive ni à me connecter au routeur, ni à ma box. Pourquoi ?
> [...]

   What is the WAN/Internet IP address of the router?  (The first two
octets of your public IP address ("a.b" out of "a.b.c.d") will do, if
you want to hide the whole thing.)  If there's another NAT router
between your ISP and the R7100LG, then that would cause problems.