Retreving Client Username by using Windows authentication

Question

I'm attempting to retrieve the user name and client machine name of the person logged on to a computer on our intranet in ASP.NET. This is just for logging purposes. I retrieve the user name "System.Security.Principal.WindowsIdentity.GetCurrent().Name", problem is whoever accessing this site showing the same username (that is server name where I have deployed my application) for all. Please help. I am using windows authentication mode in web.config.

Answer 1

The code you are using will get the WindowsIdentity associated with the current thread (which is the identity ASP.NET is running on). Unless you are impersonating based on client user identity that won't work. You need to use this:

HttpContext.Current.User.Identity.Name

Answer 2

The name of the user can be have as described by @Mehrdad. For the name of the user's machine you can use HttpRequest object like this:

if(Request.IsAuthenticated)
    string userName = Request.LogonUserIdentity.Name;
string machineAddress = Request.UserHostAddress;
string machineName = Request.UserHostName;

(edit)

In the web.config file I'm using this line:

<system.web>
    <authentication mode="Windows"/>
</system.web>

In the default.aspx.cs I'm using this:

public partial class _Default : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
        StringBuilder sb = new StringBuilder();

        if (Request.IsAuthenticated)
        {
            sb.AppendFormat("User Name: {0}<br/>", Request.LogonUserIdentity.Name);
        }
        else
        {
            sb.Append("Request not authenticated");
        }

        sb.AppendFormat("Machine Address: {0}<br/>", Request.UserHostAddress);
        sb.AppendFormat("Machine Name:    {0}<br/>", Request.UserHostName);

        lblTest.Text = sb.ToString();
    }
}

This is proucing following output:

User Name: HPAS\amantur

Machine Address: 127.0.0.1

Machine Name: 127.0.0.1