UDPSend not working with iPad over LAN

I'm having issues broadcasting over LAN.

I don't yet know much about network best practices in .NET, so perhaps I'm taking the wrong approach. I basically took this code from an answer to another question here

I'm attempting to have two machines talk directly over a local network (trying to avoid internet connections, and hopefully avoiding MasterServer just for installation time).

I'm able to use this code to have two machines, mac or pc, talk to each other over the network. But loading the exact same project on an ipad yields nothing. I have a UDPReceiver set up, and the iPad can receive UDP messages, but is not broadcasting a return.

anyone have any insight on this? I understand that .NET sockets is restricted on iOS free version of Unity. I am using Unity Pro with iOS package.

 using UnityEngine;
 using System.Collections;
 using System.Net;
 using System.Net.Sockets;
 
 
 public class UDPSender : MonoBehaviour 
 {
 
     public int remotePort = 19800;
     public int localPort = 19801;
     public string name;
     public string IP;
     public string gameName;
 
     public string broadcastSig;
     public string broadcastMsg;
 
     protected bool refreshing;
 
     protected UdpClient sender;
 
     void OnEnable () 
     {
         sender = new UdpClient(localPort, AddressFamily.InterNetwork);
         IPEndPoint groupEP = new IPEndPoint(IPAddress.Broadcast, remotePort);
         sender.Connect(groupEP);
         IP = GetLocalIP();
         InvokeRepeating("SendData", 0, 5f);
 
     }
 
 
     void OnDisable()
     {
         if(sender != null)
             sender.Close();
     }
 
     protected void SendData()
     {
         broadcastMsg = broadcastSig + " TIME: " + Time.time.ToString();
         sender.Send(System.Text.Encoding.ASCII.GetBytes(broadcastMsg), broadcastMsg.Length);  
         Quaternion test = Quaternion.identity;
 
     }
 
 
     public string GetLocalIP()
     {
         IPHostEntry host;
         string localIP = "";
         host = Dns.GetHostEntry(Dns.GetHostName());
         foreach (IPAddress ip in host.AddressList)
         {
             if (ip.AddressFamily == AddressFamily.InterNetwork)
             {
                 localIP = ip.ToString();
                 break;
             }
         }
         Debug.Log("setting IP: " + localIP);
         return localIP;
     }
 }