This once in a while is during peak hours? We have this problem here too, mostly with apache authenticating with NTLM. What I saw is that it is caused by an error in the connection with the Domain Controller. I made a packet analysis and discovered that the Netbios connetion opened by apache to authenticate the user is reset by the DC before the authentication ends. So NTLM fails and a prompt for user/pass is displayed. I suggest you to take a look on the DC load. Just my 2 cents. Rafael Sarres de Almeida Seção de Gerenciamento de Rede Superior Tribunal de Justiça Tel: (61) 319-9342 Arno.STREULI@xxxxxxxxxxxxx 06/07/2005 05:54 Para squid-users@xxxxxxxxxxxxxxx cc Assunto Problem on Authentication !??! Hello, My squid 2.5S9 is working fin, whel almost, once in a while it ask me fot my username/password via a prompt !? and I can't trace why is that ? anyone have anyidea how/where I can track trace that problem ? thanks for your help Arno Streuli PS: it's running on Solaris 8 and samba 3.0.14a ****************************************************************** DISCLAIMER - E-MAIL ------------------- The information contained in this E-Mail is intended for the named recipient(s). It may contain certain privileged and confidential information, or information which is otherwise protected from disclosure. If you are not the intended recipient, you must not copy,distribute or take any action in reliance on this information ******************************************************************