Description:
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The Webserver is IIS 5, with Windows XP, IIS NTLM authentication and SSL encryption.
No matter how I set the time limit, the download process would terminate after 5 minutes (300 seconds). See the following sample script.


Reproduce code:
---------------
<?
$filename="abc.txt"  //very very big file--over 500MB
$fp=fopen($filename,'r');
//fpassthru($fp);

while (!feof($fp)) {
  set_time_limit(299);
  echo fread($fp, 8192);
}
fclose($fp);
?>