Problem with Home-Network

Hello eBlocker-Fans,

When I start my eBlocker on above named Raspi4, the eBlocker kickes away the Fritz!Box and overtakes its place - no Internet any more. If I take my PI400, the eBlocker works fine. The Raspi4 itself with Bullseye works fine but homenet crashes, if it is connected to. As a workaround i connected the raspi4 with a new eBlocker installed by an USB to Ethernet Adapter, but it doesn't work. The same Raspi4 with Bullseye, is connecting immediatly to the Internet. Is it possible to teach eBlocker (for Example by editing a config-File) to use the adapter instead of the build-in Ethernet-connection?

Regards Thomas