Retrieving the LOGONSERVER environment variable within an ASP/MVC web application

Is there a way to retrieve the LOGONSERVER environment variable in an ASP/MVC3 application, specifically for the browser that initiated the request? When using 

Environment.GetEnvironmentVariable("LOGONSERVER");
, it seems to return the logon server for the box where IIS is running.

Fortunately, we can get the user's logon name server-side by accessing 

HttpContext.ApplicationInstance.Context.User.Identity.Name
. However, this doesn't provide access to the logonserver information.

Client-side solutions involve using JavaScript to fetch the logonserver data, but this method requires executing CreateObject and triggering an "ActiveX" authorization request in the browser. Are there any alternative approaches to obtaining this information?

javascriptasp.netenvironment-variableshttpcontext

Answer №1

After much exploration, I managed to solve this issue by incorporating this shared function into the Global.asax file.

    Public Shared Function FetchDomainController() As String
        'Fetching DNS domain name using RootDSE object
        Dim objRootDSE As Object = GetObject("LDAP://<myDomain>/RootDSE")
        Dim strNamingContext As String = objRootDSE.Get("rootDomainNamingContext")
        Dim lcDC As Object = objRootDSE.Get("dnsHostName")

        Return lcDC.ToString()
    End Function

This function can now be utilized as follows: 

<%= MyGlobalAsaxClassName.FetchDomainController() %>

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