如何确定ASP.NET站点（IIS）上的用户数？他们的信息？

Is there a way to determine the number of users that have active sessions in an ASP.NET application? I have an admin/tools page in a particular application, and I would like to display info regarding all open sessions, such as the number of sessions, and perhaps the requesting machines' addresses, or other credential information for each user.Is there a way to determine the number of users