Use same event fin packets.

lib/units/device/plugins/forward.js

@@ -71,17 +71,19 @@ module.exports = syrup.serial()
           .on('packet', function(fd, packet) {
             var proxy = proxies[fd]
 
-            if (!proxy) {
-              // New connection
-              proxy = proxies[fd] = new Proxy(fd)
-            }
+            if (packet) {
+              if (!proxy) {
+                // New connection
+                proxy = proxies[fd] = new Proxy(fd)
+              }
 
-            proxy.dest.write(packet)
-          })
-          .on('fin', function(fd) {
-            // The connection ended
-            if (proxies[fd]) {
-              proxies[fd].stop()
+              proxy.dest.write(packet)
+            }
+            else {
+              // The connection ended
+              if (proxy) {
+                proxy.stop()
+              }
             }
           })