Hi, thanks for the quick response!
Currently, I have a OpenVPN Client setup on NethServer with a default route that goes to the OpenVPN Server. The TAP (fully bridged with VPN network) interface is used. Currently, the route looks like this:
default via 10.2.3.1 dev tap0
10.2.3.0/24 tap0 proto kernel scope link src 10.2.3.5
As a result, traffic exits nethserver in the tap0 interface and proceeds to the default gateway instead of the default (enp3s0) interface that leads to my DSL modem. However, there is no way to configure the zone of the tap0 interface in the GUI.
If you want, I can setup a demo system later on for you to test