One can further parametrize things with, e.g., int_if = "fxp0" The BSDs still tend to use device-specific names versus the generic ethX or location-specif

One can further parametrize things with, e.g., int_if = "fxp0" The BSDs still tend to use device-specific names versus the generic ethX or location-specific ensNN, so if you have multiple interfaces knowing about internal and external may help the next person who sees your code to grok it.