This web interface allows you to edit the network interfaces (NICs) that are assigned to a zone. You can also change a zone's operating mode (Default, Bridge, MacVTap).
The zone mode can be changed by selecting a mode from the dropdown list under the zone name. A zone can operate in three different modes:
Default: The zone accesses one NIC directly
Bridge: All assigned NICs belong to the same network and IPFire acts like a switch between those NICs
MacVTap: The zone is attached to a NIC via a MacVTap interface
Each zone can have one (if the zone is in Default or MacVTap mode) or more (in Bridge mode) NICs assigned. This nic is either accessed natively or via a VLAN. If the RED zone is in any kind of PPP mode, you can only choose one NIC. All further PPP settings including VLANs (VDSL) can be changed in System -> Dialup.
Please note that: