how to get user machine/computer name in website

Question

Hi All,

 I need to get user machine name in my application to store in the database.

Can anyone help?

 

If this is possible.?

 

The following things I already tried.

 

Request.ServerVariables["HTTP_X_FORWARDED_FOR"];

Request.ServerVariables["REMOTE_ADDR"];

Request.UserHostAddress;

Request.UserHostName;

System.Net.Dns.GetHostEntry(Request.ServerVariables["remote_addr"]).HostName.Split(new Char[] { '.' });