I Steve,
I revert my config and now I'm ok. I don't wanna investigate further.
My WAN address is public and I'm behind another router with another public ip address. During this period of crash I asked to my provider to change the configuration of their router to act like a "firewall". Now I'm going back hoping that my brand new machin will work like the old one…
config seems perfectly ok... cross your fingers....
I hope not to bother you anymore but sound possible....
Thank you very much for your support.
Enrico