Http.HttpRequestException to vagrant host

Question

Hi. I have REST API server on my vagrant machine. And I write client for it on c# (VS2015).

Have same code:

using (HttpClient client = new HttpClient())

{ 

    client.BaseAddress = new Uri(_server);

  client.DefaultRequestHeaders.Accept.Clear();     

    client.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("application/json")); 

    HttpResponseMessage response = null; 

    try {          

          response = await client.GetAsync("http://api.mysite.ru/getAll"); 

    } 

    catch (HttpRequestException e) 

    { 

          Debug.WriteLine(e.Message); 

    }

 }

Trouble:

Exception thrown: 'System.Net.Http.HttpRequestException' in mscorlib.ni.dll
An error occurred while sending the request.

If I send request to another (non-vagrant) host, all is OK.

Question: How I can solve this?

F*cking with this for third day. Thanks)