Hi .. I have read the squid.conf.default file , but I am not getting it .. please help me ... tell me how to write these external acls and how to check some condition thro' ldap. I want to use a helper 'squid_ldap_match'. I just want that on every request the user makes, I want to check a flag and if it is set then allow browsing otherwise do not allow. One way I know is at the time of authentication thro' ldap I am checking certain condition and allowing the user to browse. If I forcibly falls the condition then it will work but in that case a smart user will not close the browser in order to avoid again user authentication. Thats why I need some mechanism to take care of this on every request. Regards Imtiyaz ---------------------------------------------------------- Netcore Solutions Pvt. Ltd. Website: http://www.netcore.co.in Spamtraps: http://cleanmail.netcore.co.in/directory.html ----------------------------------------------------------