...
If a Unified Firewall is managed in the LANCOM Management Cloud (LMC), by default all of the networks are transmitted via the ETH1 interface. Although the LMC allows you to assign the networks to a different interface via the menu Project specifications → Basic → Extended settings, these settings apply globally to all Unified Firewalls in the project. The LMC API can be used to activate the variable UF_DEFAULT_IF, which is can then be used to set the interface for a specific Unified Firewall or site.
...