Can't get logonuser

[Little Little]

I would like to get user logon from server by
USERLog = Request.ServerVariables("LOGON_USER")
but it isn't see. i don't know what the problem and how i can
solve in this. But i try to get other value can see it.

 

[Naveen K Kohli]

For this to work.. you need to use Windows Authentication or Basic
authentication and turn off anonymous acess in IIS.

 

[Dave Clark]

After looking again, I think the WindowsIdentity gets the