adGenAOSXConnectFirstIfPort 1.3.6.1.4.1.664.5.53.1.5.1.1.1.6

The port number of the interface described by adGenAOSXConnectFirstIfType -- set to 0 if the interface can be defined by adGenAOSXConnectFirstIfNumber (and adGenAOSXConnectFirstSubIfNumber)