Ignore remote devices by default, use -R or --allow-remote to override.

lib/units/provider/index.js

@@ -117,6 +117,12 @@ module.exports = function(options) {
       return device.id === '????????????'
     }
 
+    // Check whether the device is remote (i.e. if we're connecting to
+    // an IP address (or hostname) and port pair).
+    function isRemoteDevice(device) {
+      return device.id.indexOf(':') !== -1
+    }
+
     // Helper for ignoring unwanted devices
     function filterDevice(listener) {
       return function(device) {
@@ -124,6 +130,13 @@ module.exports = function(options) {
           log.warn('ADB lists a weird device: "%s"', device.id)
           return false
         }
+        if (!options.allowRemote && isRemoteDevice(device)) {
+          log.info(
+            'Filtered out remote device "%s", use --allow-remote to override'
+          , device.id
+          )
+          return false
+        }
         if (options.filter && !options.filter(device)) {
           log.info('Filtered out device "%s"', device.id)
           return false