Failed to connect to offline WCF service over HTTPS

I am unable to connect to my self served WCF service running with WebHttp + HTTPS bindings. For various reasons, I configure the service entirely in code, rather than using a config file, and create the service this way:

private ServiceHost CreateService()
{
    Type myServiceType = typeof(MyService);
    ServiceHost myService = new ServiceHost(myServiceType, new Uri(Constants.ServiceAddress));
    ContractDescription contract = ContractDescription.GetContract(myServiceType);

    WebHttpBinding httpsBinding = new WebHttpBinding(WebHttpSecurityMode.Transport);
    httpsBinding.Security.Transport.ClientCredentialType = HttpClientCredentialType.None;

    ServiceEndpoint endpoint = myService.AddServiceEndpoint(myServiceType, httpsBinding, "MyService.svc");
    endpoint.Behaviors.Add(new WebHttpBehavior());

    ServiceMetadataBehavior metadataBehavior = new ServiceMetadataBehavior();
    metadataBehavior.HttpGetEnabled = true;
    metadataBehavior.HttpsGetEnabled = true;
    myService.Description.Behaviors.Add(metadataBehavior);

    myService.Credentials.ServiceCertificate.SetCertificate(
        StoreLocation.LocalMachine, 
        StoreName.My, 
        X509FindType.FindByThumbprint, 
        Constants.CertThumbprint);

    return myService;
}

      

        
        
        
      

    

When I run this code, the service is created and started without error. The service states that it is open when I request it in code, but it netstat

shows that someone is listening on the corresponding port. I have a firewall exception that allows incoming connections on this port.

However, if I try to open the service endpoint address in the browser or client, the connection will fail instantly. Why? Is there any service or environment host configuration I forgot?

EDIT

No error message for message --- no 404, 500, or other error. The browser behaves as if it cannot open a connection to the target port. The server doesn't seem to even see the incoming connection.