<%flags>
    inherit=> undef
</%flags>
<%perl>
$m->autoflush(0);
$m->clear_buffer();
$r->header_out->add("WWW-Authenticate" => 'Basic realm="RealmChain"');
$r->header_out->add("HTTP/1.0 401 Unauthorized" => '');
$r->send_http_header();
$m->abort();
</%perl>