PreAuthenticate does not work on CredentialCache.DefaultNetworkCredentials

Hi,

I would like to know why PreAuthenticate=true does not work if i use the CredentialCache.DefaultNetworkCredentials. Is it any reason for this. I'm using .net 2.0 web and consume to the wcf web service. I want to reduce the authentication time that why i plan to use PreAuthenticate=true at my asp.net. But it does not work and keep checking authentication when i call the web services.

wcf web service support ntml and Kerberos. I can't use user and password. I can use default credential only for my requirement.

Is it something wrong on my test or not support?





Regards,



Here is my test code snap.

        HttpWebRequest req;
        WebResponse resp;
        string url = "http://thirpartysystem:7047/SystemService";

        NetworkCredential _Cred;
        CredentialCache credCache = new CredentialCache();
        _Cred = CredentialCache.DefaultNetworkCredentials;

        credCache.Add(new Uri(url), "Negotiate",
                      _Cred);
        req = (HttpWebRequest)WebRequest.Create(url);
        req.PreAuthenticate = false;
        req.Credentials = credCache;
        resp = req.GetResponse();
        if (req.HaveResponse)
            resp.Close();

        req = HttpWebRequest.Create(url) as HttpWebRequest;
        req.PreAuthenticate = true;
        req.Credentials = credCache;
        resp = req.GetResponse();
        if (req.HaveResponse)
            resp.Close();
        //Result is 
        //401
        //401
        //200
        //401
        //200

        _Cred = new NetworkCredential("user", "password", "domain");
        credCache.Add(new Uri(url), "Negotiate",
                      _Cred);
        req = (HttpWebRequest)WebRequest.Create(url);
        req.PreAuthenticate = false;
        req.Credentials = credCache;
        resp = req.GetResponse();
        if (req.HaveResponse)
            resp.Close();

        req = HttpWebRequest.Create(url) as HttpWebRequest;
        req.PreAuthenticate = true;
        req.Credentials = credCache;
        resp = req.GetResponse();
        if (req.HaveResponse)
            resp.Close();

        //Result is
        //401
        //200
        //200

---

Make Simple & Easy