Security :: Impersonation / Getting Error / Login Failed For User 'NT AUTHORITYANONYMOUS LOGON

Aug 16, 2010

I'm running IIS 6.0 on a Windows 2003 server and running an ASP.NET 4 application which connects to an SQL Server 2005 database on another server. I have my Default.aspx page set to Windows authentication with anonymous access disabled.

When I load up the page it asks for a username and password (as expected), I enter my credentials and it comes up with the following error:Login failed for user ''. The user is not associated with a trusted SQL Server connection.

If I add the following to my web.config file: <identity impersonate="true"/> then I get the following error:

Login failed for user 'NT AUTHORITYANONYMOUS LOGON'.

And if I add the <identity impersonate> tag set to true and with my username and password included it connects successfully.

I can't leave this in there as I want each user to connect as themselves, so why is the server not using the credentials that I enter when prompted to connect to the database ?

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