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Posted on by Ohlfsen

245

Hi.

Someone knows what's wrong with this picture in a Dynamics Nav 2009 R2 web-service test scenario.

Visual studio 2010 Service reference projekt has app.config that looks like this.

<?xml version="1.0" encoding="utf-8" ?>

<system.serviceModel>

<binding name="TestWS_Binding" closeTimeout="00:01:00" openTimeout="00:01:00"

receiveTimeout="00:10:00" sendTimeout="00:01:00" allowCookies="false"

bypassProxyOnLocal="false" hostNameComparisonMode="StrongWildcard"

maxBufferSize="65536" maxBufferPoolSize="524288" maxReceivedMessageSize="65536"

messageEncoding="Text" textEncoding="utf-8" transferMode="Buffered"

useDefaultWebProxy="true">

<readerQuotas maxDepth="32" maxStringContentLength="8192" maxArrayLength="16384"

maxBytesPerRead="4096" maxNameTableCharCount="16384" />

</security>

</binding>

</basicHttpBinding>

</bindings>

<windows allowedImpersonationLevel="Delegation"

allowNtlm="true"/>

</clientCredentials>

</behavior>

</endpointBehaviors>

</behaviors>

<endpoint address="http://10.0.0.144:7047/DynamicsNAV/WS/CRONUS%20Danmark%20A/S/Codeunit/TestWS"

binding="basicHttpBinding" bindingConfiguration="TestWS_Binding"

behaviorConfiguration="allowDelegation"

contract="WebServiceTest.TestWS_Port" name="TestWS_Port" />

</client>

</system.serviceModel>

</configuration>

The customsettings.config of the service has

Everything is running on local machine.

SQL server, Web server Service runs under system account.

When this line

in app.config says "Windows" things are working.

When it says "Ntlm" like above this message is returned:

"The HTTP request is unauthorized with client authentication scheme 'Ntlm'. The a

uthentication header received from the server was 'Negotiate'."

Question:

I obviously did something wrong but how on earth can the error message say

"received from the server was 'Negotiate'.""

when "Negoatiate" should not be an option in the webservice part of the equation due to the line

in the "customsettings.config" and the comment in the file says "true: Use NTLM only".

Pointers highly appreciated.

Best regards.

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Community Member on at

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Can you please paste the C# or vb code that you wrote to access the webservice?

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Ohlfsen 245 on at

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Tnx for your interest.

Here's the code.

B.R AO

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using TestWebService;
using System.Net;

namespace TestWebService
{
public delegate void ObjectParameterDelegate(object value);
class Program
{
      static void Main(string[] args)
      {
          Console.WriteLine("Testing WebService");
          WebServiceTest.TestWS_PortClient Tester = new WebServiceTest.TestWS_PortClient();
          Tester.ClientCredentials.Windows.ClientCredential = CredentialCache.DefaultNetworkCredentials;
          try
          {
              Console.WriteLine(Tester.GetTheTime());
              Console.WriteLine();
          }
          catch (Exception Ex)
          {
              Console.WriteLine(Ex.Message)                    ;
              Console.WriteLine("End Exception");
          }
          Console.WriteLine("Press Any Key");
          Console.ReadKey();
      }
}
}

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Community Member on at

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Hi,

Maybe you should try this:

Tester.ClientCredentials.Windows.ClientCredential.UserName = "YourUsername";

Tester.ClientCredentials.Windows.ClientCredential.Password = "YourPassword";

Tester.ClientCredentials.Windows.ClientCredential.Domain = "YourDomain";

instead of this:

Tester.ClientCredentials.Windows.ClientCredential = CredentialCache.DefaultNetworkCredentials;

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Luc van Vugt on at

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Hi,

What was eventually the solution to your issue?

Thanx in advance,

Luc

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Ohlfsen 245 on at

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Omg. So sorry I don't recall if it was the answer, so much time passed since then. Would be happy to share, if only I could remember.

All this webservice authentication stuff, kerberos/ntlm etc can really be mind cripling some times.

You think you have done what the (really poor) documentation says spn wise and otherwise but still so many things can influence if it works or not depending on the environment where you have to install the stuff.

B.R. Allan

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Luc van Vugt on at

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Fully agree, that's why I ask ... have installed a new service (for the xth time) and now running into new things :-(

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mmv 11,471 on at

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Hi,

As Dragan Jovanoski said, if you provide the credentials, it might work.

You may try that solution.

Best Regards,

MMV

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4BzSoftware 6,073 on at

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Hi MMV,

SPN and Delegation in NAV2009 are difficult things and even have experience, it takes me a day for each new setup to solve new things :-( But make sure you publish the web service successfully by web browser checking.

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Luc van Vugt on at

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True, but just wanted to know what eventually solved. It has not been shared (yet).

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Ohlfsen 245 on at

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Sometimes find myself using Powershell to test web service access.

Can do something like this

$proxy = new-webserviceproxy -Uri 'localhost/.../TestWS&; -usedefaultcredential

to test default credentials or

$cre=Get-Credentials

$proxy = new-webserviceproxy -Uri 'localhost/.../TestWs&; -Credential $cre

which will allow me to enter user and password

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