[Mediawiki-l] maintenance/dumpBackup.php + SingleSign On Configuration

[L.M.J.]

Hello,

 I'm running mediawiki on a Intranet server who required authication. When
I would like to run "maintenance/dumpBackup.php > wikidb.xml"   
wikidb.xml contains only a 401 HTTP error : Authorization required.

  Can I pass HTTP User & Password on anyway to 'dumpBackup.php' or another
trick to dump the Wiki DB?

  Thanks  by advance!