If your environment supports Kerberos as the only authentication (not NTLM) you could try my helper program squid_kerb_auth and squid_kerb_ldap at http://squidkerbauth.cvs.sourceforge.net/squidkerbauth/ Markus "Leonardo Rodrigues Magalhães" <leolistas@xxxxxxxxxxxxxx> wrote in message news:468540B5.7080603@xxxxxxxxxxxxxxxxx Hello Guys, I've enabled squid authentication several times, including windows authentication integration through smb_auth and recently some squid_ldap_auth for direct LDAP check, without the SMB stuff. But i was required for doing transparent authentication .... squid should be able to see the user's used to log on the machine and the domain, without the username/password http prompt. Which module should i be using for that ?? Are there any tutorials available ? I'll be using a Windows 2000 AD controller for that with squid running on Fedora Linux. I also know there's no authentication on transparent requests ..... squid will NOT be running on transparent mode, it will be configured on browsers. Just authentication that should be done without user/password prompt. -- Atenciosamente / Sincerily, Leonardo Rodrigues Solutti Tecnologia http://www.solutti.com.br Minha armadilha de SPAM, NÃO mandem email gertrudes@xxxxxxxxxxxxxx My SPAMTRAP, do not email it