The port of the connection tester used in Network.TestConnection.

	function ResetIP() {
		Network.connectionTesterIP = "127.0.0.1";
		Network.connectionTesterPort = 10000;
	}

using UnityEngine;
using System.Collections;

public class Example : MonoBehaviour {
    void ResetIP() {
        Network.connectionTesterIP = "127.0.0.1";
        Network.connectionTesterPort = 10000;
    }
}

import UnityEngine
import System.Collections

public class Example(MonoBehaviour):

	def ResetIP() as void:
		Network.connectionTesterIP = '127.0.0.1'
		Network.connectionTesterPort = 10000