Just for your information:
DNS, DHCP is done by another (fast and stable) device, wich also does the routing in my network. So I need only a simple client (which should do SMB NTLMv2) and this is the A1300.
So what I need for the A1300 is just an IP address like 10.0.0.1/24 with the Gateway 10.0.0.254 and the definition of the DNS server 10.0.0.254 as well. The A1300 should not act as server for DHCP, DNS, etc. (I even don’t need WAN or WLAN).
When I tried to configure that, the A1300 ignored my gateway and even the DNS server at the beginning. Now I have added a static route because the gateway setting doesn’t work and I removed/added multiple checkboxes until the device created correct DNS queries.