Very high ping in a client-server application on Windows Server 2012. How to reduce it?

Question

System administration

I created a cloud server on Windows Server 2012 R2. When you ping from your computer to this server, the ping is on average 60ms. I wrote a simple client/server application in C#.
Customer:

TcpClient client = new TcpClient();
client.Connect(IPAddress.Parse("адрес"), 10000);
NetworkStream stream = client.GetStream();
BinaryReader reader = new BinaryReader(stream);
BinaryWriter writer = new BinaryWriter(stream);
Stopwatch sw = new Stopwatch();
List<float> pings = new List<float>();
DateTime startTime = DateTime.Now;
Random random = new Random();

while(true)
{
    byte[] packet = Enumerable.Repeat<byte>(100, random.Next(50, 100)).ToArray();
    sw.Start();
    writer.Write(packet.Length);
    writer.Write(packet);
    packet = reader.ReadBytes(reader.ReadInt32());
    sw.Stop();
    pings.Add((float)sw.Elapsed.TotalMilliseconds);
    sw.Reset();
    DateTime now = DateTime.Now;          
    if(now - startTime > TimeSpan.FromSeconds(1))
    {
        startTime = now;
        Console.WriteLine(pings.Average());
        pings.Clear();
    }
}

Server:

TcpListener listener = new TcpListener(IPAddress.Any, 10000);
listener.Start();
TcpClient client = listener.AcceptTcpClient();
NetworkStream stream = client.GetStream();
BinaryReader reader = new BinaryReader(stream);
BinaryWriter writer = new BinaryWriter(stream);

while (true)
{
    byte[] packet = reader.ReadBytes(reader.ReadInt32());
    writer.Write(packet.Length);
    writer.Write(packet);
}

When running the server on Windows Server, and the client at home, I get ping results on average 200ms.
In my opinion, the problem lies in the Windows Server settings. Tell me who knows.

Answer 1

Solution found. If anyone is interested, here is the article:
https://support.microsoft.com/kb/214397?wa=wsignin1.0
In this code, the problem is solved as follows:
Both in the client and in the server.