I've searched through the forum but I didn't found a solution regarding my problem.
I retrieve internet connection from WAN then I use a wifi network for the clients like my pc and all the connection are under VPN.
The problem is that from WAN port I retrieve internet but the DNS name server and domain search are blocked. But if I set the DNS nameserver on my pc the DNS manually I can navigate correctly, if not I can navigate only through IP.
This is my configuration: