Hello, apparently the provider opened only 1 Lan port, the other ports are not available. Only problem now is that I connected the deco to the only open Lan-port and had to put my desktop straight into the deco extra Lan port. The desktop only worked after changing from wireless router-mode to Access Point-mode. Shouldn't the internet at the extra lan port of the deco also work in wireless router mode? Or do I need to expand my single lan port the with a lan-switch or hub? Thank you.

  @Hometest 

 

If you have static IP address configured on your desktop PC, that would explain it. When Deco runs in Router mode, it creates its own subnet, which is going to be incompatible with your PC static address. When Deco is in AP mode, Deco uses your ISP Router subnet and PC with static IP from that subnet will get network access.