Can I detect Network User ID on an asp.net App

if the browser is on an intranet can I find out who is hitting my page? I want to do this w/o cookies if possible...

Thanks.

First, use windows authentication in IIS. Then the credentials will be passed to ASPNET. From there, you can do something like HttpContext.CurrentUser.Identity.UserName...(that may not be exact, but it will get you close).