Add the proxy-URL to the Intranet Zone in Internet Explorer! MediaPlayer 9 + doesn't recognize if the proxy is in the local intranet zone and doesn't send username and password! I had the same problem but finally it works with this solution! Regards Siegfried -----Ursprüngliche Nachricht----- Von: Simone Rossato [mailto:simo.ross@xxxxxxxxxx] Gesendet: Freitag, 06. Oktober 2006 12:10 An: squid-users@xxxxxxxxxxxxxxx Betreff: WMP & NTLM Authentication on Squid 2.5 We have a squid 2.5 stable with an external authentication with MS ActiveDirectory LDAP. Internet Explorer runs perfectly, without any kind of problem, but when you try to start a box with windows media player (9 or 10), you receive an authentication box / prompt. It seems like he doesn't recognize the NTLM authentication. Someone has an idea? I saw that was an old argument, but I don't see any reply. Many Thanks sr