Is it possible to use SoapUI for testing services secured with SPNego?

I have web service secured with SPNego (HTTP challenge returns WWW-Authenticate: Negotiate). This security mode is also referred as Windows integrated authentication. Is it possible to use SoapUI to test this service? It looks like SoapUI (4.0.0) ends communication 开发者_如何学运维once it gets challenge 401 HTTP response instead of following negotiation algorithm.

please see answer to the same question here:

Testing web service with SoapUI and Windows authentication

working solution is to use proxy for adding Windows authentication headers to your requests