Web service call-out with authentication (NTLM)

Author: dennis.van.duijn@sogeti.com (Dennis van Duijn)

We try to call a (.Net) webservice from our Uniface 9.3.02 application, using the NTLM authentication scheme.
Authentication with the webserver seems to fail.

The authentication conversations with the webservice normally seems to run like this (SoapUI client, monitored with WireShark):

to WS:   SOAP Service Post (Anonymous)
from WS: HTTP 401 Unauthorized
to WS:   SOAP Service Post, NTLM_Negotiate
from WS: HTTP 401 Unauthorized, NTLM Challenge
to WS:   SOAP Service Post, NTLM_Auth
from WS: SOAP 200 OK

The conversation with the Uniface application seems to stops after the first 401 reply:
to WS:   SOAP Service Post (Anonymous)
from WS: HTTP 401 Unauthorized

We are using the SOAP connector U2.0
We did try the driver setting scheme=L as well as scheme=LN

Does anyone have any leads on getting this to work?

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