<system.webServer>

     ...

    <httpErrors xdt:Transform="Insert" errorMode="DetailedLocalOnly" existingResponse="Replace" defaultResponseMode="ExecuteURL">
      <remove statusCode="403" subStatusCode="-1" />
      <remove statusCode="404" subStatusCode="-1" />
      <remove statusCode="500" subStatusCode="-1" />
      <error statusCode="403" path="/Error/Forbidden" responseMode="ExecuteURL" />
      <error statusCode="404" path="/Error/NotFound" responseMode="ExecuteURL" />
      <error statusCode="500" path="/Error/InternalServerError" responseMode="ExecuteURL" />
    </httpErrors>

    ...

  </system.webServer>

    [SessionState(SessionStateBehavior.Disabled)]
    [OutputCache(Location = OutputCacheLocation.None, NoStore = true)]
    public class ErrorController : Controller
    {
        private static readonly Logger Log = LogManager.GetLogger("HttpError");

        private HttpStatusCode _httpStatusCode;
        private string _statusCodeDescription;

        // 500
        public ActionResult InternalServerError()
        {
            SetResponse(HttpStatusCode.InternalServerError);
            // message to view from TempData
            return View();
        }

        // 404
        public ActionResult NotFound()
        {
            SetResponse(HttpStatusCode.NotFound);
            return View();
        }

        // 403
        public ActionResult Forbidden()
        {
            SetResponse(HttpStatusCode.Forbidden);
            return View();
        }

        private void SetResponse(HttpStatusCode httpStatusCode)
        {
            _httpStatusCode = httpStatusCode;
            _statusCodeDescription = HttpWorkerRequest.GetStatusDescription((int)_httpStatusCode);
            Response.StatusCode = (int)_httpStatusCode;
            Response.StatusDescription = _statusCodeDescription;
        }

        protected override void OnActionExecuted(ActionExecutedContext context)
        {
            if (!Log.IsDebugEnabled)
                return;

            Log.Debug(String.Format("{0}, {1}, IP {2}, \"{3}\", REF {4}",
                (int)_httpStatusCode,
                HandleErrorFilter.GetRequestInfo(Request),
                Request.UserHostAddress,
                Request.UserAgent,
                Request.UrlReferrer == null ? "---" : Request.UrlReferrer.AbsoluteUri));
        }

    }