Check if this machine has a public IP address.
It checks all the network interfaces for IPv4 public addresses and returns true if one address is found.
using UnityEngine; using System.Collections;
public class ExampleClass : MonoBehaviour { void OnGUI() { if (GUILayout.Button("Start Server")) { bool useNat = !Network.HavePublicAddress(); Network.InitializeServer(32, 25002, useNat); MasterServer.RegisterHost("MyUniqueGameType", "JohnDoes game", "l33t game for all"); } } }