asp.net - ASP Server variable not working on local IIS -

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i'm working on simple asp.net page (handler, actually) check value of logon_user server variable. works using visual studio's built-in web server , works in other sites deployed live intranet site. doesn't work on iis instance on local xp machine. how can fix it, or what's going on if can't?

what authentication have enabled in iis? anonmyous, basic, digest, integrated windows? sounds me anonymous access enabled/allowed, , nothing else. means logon_user not populated.

when access local iis, trying using http://127.0.0.1 in particular if use ie. ie recognize "localhost" being in local trusted zone , automatically pass xp login credentials through when integrated windows auth enabled.


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