[UNet] "No such host is known" error on iOS

Hello, I just done my new app and its working on UnityEditor, but now I create Xcode project (v6.4) and I got error:

 2015-07-22 17:24:26.554 ComradeWars[414:45370] -> registered mono modules 0x1014058a0
 -> applicationDidFinishLaunching()
 PlayerConnection initialized from /private/var/mobile/Containers/Bundle/Application/5FDB6136-231C-45F5-BC0A-7A6BCBB12D96/ComradeWars.app/Data (debug = 0)
 PlayerConnection initialized network socket : 0.0.0.0 55000
 Multi-casting "[IP] 192.168.0.103 [Port] 55000 [Flags] 3 [Guid] 1192420317 [EditorId] 342940737 [Version] 1048832 [Id] iPhonePlayer(iPad):56000 [Debug] 1" to [225.0.0.222:54997]...
 Waiting for connection from host on [192.168.0.103:55000]...
 PlayerConnection accepted from [192.168.0.101] handle:0x8
 -> applicationDidBecomeActive()
 Requesting Resolution: 2048x1536
 Init: screen size 2048x1536
 Initializing Metal device caps
 Initialize engine version: 5.1.1p4 (c439df19cd24)
 SocketException: No such host is known // <- HERE
   at System.Collections.Specialized.ListDictionary+DictionaryNodeEnumerator.MoveNext () [0x00000] in <filename unknown>:0 
   at System.Net.Dns.GetHostByName (System.String hostName) [0x00000] in <filename unknown>:0 
   at System.Net.Dns.GetHostEntry (System.String hostNameOrAddress) [0x00000] in <filename unknown>:0 
   at ComradNetManager.LocalIpAddress () [0x00000] in <filename unknown>:0 
   at ComradNetManager.ConfigNetwork () [0x00000] in <filename unknown>:0 
   at ComradNetManager.Start () [0x00000] in <filename unknown>:0

I tried debug it.. In UnityEditor everything is going alright. Init called etc. But on iOS it crashs here:

 public string LocalIpAddress()
     {
         IPHostEntry host;
         string localIP = "";
         host = Dns.GetHostEntry(Dns.GetHostName());
         foreach (IPAddress ip in host.AddressList)
         {
             if (ip.AddressFamily == AddressFamily.InterNetwork)
             {
                 localIP = ip.ToString();
                 break;
             }
         }
         logger.text += "\nLocalIpAddress called and IP is: " + localIP;
         return localIP;
     }

 

Any one know, how to fix it?