.net Auto Authentication

Hi ,i want to use dashboard inside in our web application .so, i pasted iframe inside Html.it rendered in browser with kibana login page. but after entered login credentials it again shows the login page.how to rectify this.Any one suggest the solution.

And i also want to auto login while i call iframe in our application.i don't know how to acheive this.

Thanks in advance

This is a duplicate of Auto Authentication using .net. Let's continue the thread in that other issue. Thanks.