Hi Experts,

I have this .NET application to be run in an intranet environment. It is configured so that it requires Windows Authentication before you can access the website (Anonymous access is disabled). This website calls a web service (enable anonymous access) and the web service calls the DB. We do have a token-based authentication between the web application and the web service to secure the communication between them.

The issue I'm facing is that when I deploy this to production, I'm having an intermittent issue whereby the communication between the web application and the web service failed. The 401 issue was thrown. This is actually working fine in our QA environment. Is this an issue with Active Directory? Or could it be an isssue with FQDN as mentioned here: http://support.microsoft.com/default.aspx?scid=kb;en-us;896861?

The weirdest thing is that this is happening intermittently when tested in both on the server itself and a remote workstation in my client's environment. But, this is working perfectly in my environment.

OS: Windows Server SP1 IIS 6 .NET 3.5 Framework

Any idea about the 401 (Unauthorized) issue?? Thx for the help...

This is from the log...

Event code: 3005

Event message: An unhandled exception has occurred.

Event time: 4/5/2010 10:44:57 AM

Event time (UTC): 4/5/2010 2:44:57 AM

Event ID: 6c8ea2607b8d4e29a7f0b1c392b1cb21

Event sequence: 155112

Event occurrence: 2

Event detail code: 0

Application information:

Application domain: xxx

Trust level: Full

Application Virtual Path: xxx

Application Path: xxx

Machine name: xxx

Process information:

Process ID: 4424

Process name: w3wp.exe

Account name: NT AUTHORITY\NETWORK SERVICE

Exception information:

Exception type: WebException

Exception message: The request failed with HTTP status 401: Unauthorized.

Request information:

Request URL: http://[ip]/[app_path]

Request path: xxx

User host address: [ip]

User: xxx

Is authenticated: True

Authentication Type: Negotiate

Thread account name: xxx

Thread information:

Thread ID: 6

Thread account name: xxx

Is impersonating: False

Stack trace:    at System.Web.Services.Protocols.SoapHttpClientProtocol.ReadResponse(SoapClientMessage message, WebResponse response, Stream responseStream, Boolean asyncCall)

at System.Web.Services.Protocols.SoapHttpClientProtocol.Invoke(String methodName, Object[] parameters)

at wsVulnerabilityAdvisory.Service.test()

at test.Page_Load(Object sender, EventArgs e)

at System.Web.Util.CalliHelper.EventArgFunctionCaller(IntPtr fp, Object o, Object t, EventArgs e)

at System.Web.Util.CalliEventHandlerDelegateProxy.Callback(Object sender, EventArgs e)

at System.Web.UI.Control.OnLoad(EventArgs e)

at System.Web.UI.Control.LoadRecursive()

at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)