Question

Logon failure when calling a wcf service that calls Directory.GetFiles to a share drive on network

Asked by: daedalux

I've been stumped for the last two days on the following:

I have an app on local machine that calls a method in a wcf service on the network that tries to get the files on yet another network share drive. I get >> Logon failure: unknown user name or bad password.

The service is installed on IIS.

What I notice is that the user logging on to the share drive is myLocalMachine\ASPNET, which is clearly not a domain user.

I have tried a number of things including:

1-- <authentication mode="Windows" />
<identity impersonate="true" userName="mydomain\validUser" password="pw"/>
in the service's web.config.

2-- Tried adding
<serviceAuthorization impersonateCallerForAllOperations="true" />
in service's web.config, and:
[OperationBehavior(Impersonation = ImpersonationOption.Allowed)]
to every method of my service class ( also tried ImpersonationOption.Required)

3-- Besides using the automatically configured default service reference, I tried playing with
          <identity>
            <dns value="mydomain\validUser"/>
          </identity>
on service and
    <identity>
        <userPrincipalName value="mydomain\validUser" />
    </identity>
in calling app, although I understand this is not meant for this purpose, so I didn't expect it to help.

I've played with some IIS settings to no avail.
Setting impersonation on the calling app also makes no difference.

Can anyone please point me in the right direction?

Thanks!

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Asked On
2009-11-05 at 07:36:29ID24874771
Tags

wcf service file network drive logon failure

Topics

Web Services and WCF

,

.NET Framework 3.x versions

,

Web Services

Participating Experts
2
Points
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Comments
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Answers

 

by: deepudeepamPosted on 2009-11-06 at 06:11:42ID: 25759213

hi,

You are using Windows authentication and hope anonymous access is disabled, so only domain users can access it.

Refer the following link,
http://www.codeproject.com/KB/WCF/WCFBasicHttpBinding.aspx#Step%208:-%20Create%20the%20WCF%20client

Regards
Deepu

 

by: mas_oz2003Posted on 2009-11-07 at 15:17:52ID: 25768551

some alternatives:
Aternative 1:
See this link: ("Impersonate the Authenticating User in Code" section)
http://support.microsoft.com/kb/306158
You have to do it programmatically in the specific part of the code that requires the network access.
The web.config is not good solution because it saves user name and password in the file itself.

Alternative 2:
create a new domain user that has the permissions of the anonymous user + permissions to the share folder.
In your IIS virtual directory setup change the anonymous user with this new user.
Check fig 7 at:
http://www.beansoftware.com/ASP.NET-Tutorials/Set-Up-IIS-ASP.NET.aspx
Also make sure this new user has access to the share.

The wcf web service is hosted in ISS as asp.net web service.

 

by: mas_oz2003Posted on 2009-11-07 at 15:22:06ID: 25768564

 

by: daedaluxPosted on 2009-11-13 at 06:47:59ID: 25814299

Thanks guys for you suggestions and sorry to take so long to get back.

mas_oz2003: your first link was helpful in that it helped me determine exactly who the context user was throughout the service call and function calls.

The article I found that had by far the most thorough instructions and covered every component (code, configurations, service, client) can be read here:
http://geekswithblogs.net/manesh/archive/2009/04/23/setting-up-wcf-to-impersonate-client-credentials.aspx

After going through that article, I was able to impersonate and control the account being impersonated.

Thank for you help guys!!

20120131-EE-VQP-002

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