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Editorial Team
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Asked: 2026-05-12T07:23:13+00:00

I want to be able to authenticate an NT username/password combination through an ASP.NET

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I want to be able to authenticate an NT username/password combination through an ASP.NET site, completely separate from the username that’s recognized through Request.ServerVariables(“LOGON_USER”) and the like. There are accounts that will have the rights to completely override others, but the users will still have to enter the correct password to do so.

I tried using the LoginUser function from advapi32.dll, but that only tries the login for the local machine (which would be the application server). Is there something that will work for checking the network in general?

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  1. Editorial Team

    You could authenticate against Active Directory.

    An ASP.NET application can use Forms
    authentication to permit users to
    authenticate against Active Directory
    using the Lightweight Directory Access
    Protocol (LDAP). After the user is
    authenticated and redirected, you can
    use the
    Application_AuthenticateRequest method
    of the Global.asax file to store a
    GenericPrincipal object in the
    HttpContext.User property that flows
    throughout the request.

    http://msdn.microsoft.com/en-us/library/ms180890

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