You can find ASP.Net Test Page using this tool.
.NET is a developer platform made up of tools, programming languages, and libraries for building many different types of applications. ASP.NET extends the .NET developer platform with tools and libraries specifically for building web apps.
The remote web server uses the default ASP.Net index page. This page may contain some sensitive data like the server root and installation paths. This could potentially leak useful information about the server installation to a remote, unauthenticated attacker.
Remove the default index page.