Linux Airwall Server or macOS Airwall Agent interface selection
The Linux Airwall Server and macOS Airwall Agent implement an interface auto-selection method. When you first install the Airwall Agent or Server, Linux or macOS determines the default gateway of the host and uses the associated network interface.
Note: Auto-selection is per profile.
Troubleshooting
If your macOS Airwall Agent is reporting as online, but does not seem to be working, check that the correct network interface is selected in the profile. See Set your preferred network in the macOS Airwall Agent (HIPclient-OSX).