@NicoC Follow this guide. Then turn off your computer's wi-fi and connect by ethernet cable to the router LAN port. Start a browser and open the IP address you discovered when following the guide...

Unfortunately the home series devices do not support such level of granularity in Virtual Servers and Firewall settings.

@Jarrmar If you trying to configure C6 in AP mode you can refer to that guide. In AP mode the LAN IP address of the router should be set in the same network subnet as the primary (VM sh3). If the you...

@torbau It maybe the case that you have only Bandwidth Control feature on your device. Although, this router is advertised as capable of 'QoS by Device' in the specifications section, I couldn't find...

@oferbu You can't upgrade with a FW version from another region (i.e can't put US to EU and vice versa). If your router is EU version then the latest FW for you to upgrade is:...

OK. Now as a last resort: 1. Make notes about your router configuration (for example in Notepad). 2. Hard reset (method 1) the router with the reset button on the back panel. 3. Instead restoring...