Hi Thank you for your answer , I take all the groups and users from Active Directory ,it's possible to use this groups to create ACL with groups that i have in active directory (access, deny)? the people that inside the domaine i add just the ip adresse and port of proxy in the browser they can connect , the people from outside of the domaine they ask him the user and password . the squid file: auth_param ntlm program /usr/bin/ntlm_auth --helper-protocol=squid-2.5-ntlmssp auth_param ntlm children 5 auth_param ntlm keep_alive on auth_param basic program /usr/bin/ntlm_auth --helper-protocol=squid-2.5-basic auth_param basic children 5 auth_param basic realm Squid AD auth_param basic credentialsttl 2 hours acl ntlm proxy_auth REQUIRED http_access allow localhost http_access deny all icp_access allow localnet icp_access deny all htcp_access allow localnet htcp_access deny all url_rewrite_program /usr/bin/squidGuard -c /etc/squid/squidGuard.conf squidGuard: pass !porn !adult !publicite !warez !manga !aggressive !blog !hacking !games !audio-video !redirector !malware all redirect http://127.0.0.1/index.html The idea is to use the same groups of active directory OU(organistation units) with acl exemple : Finance OU { pass !porn !adult !publicite !warez !manga !aggressive !blog all redirect http://127.0.0.1/index.html } admin OU { pass all } it s possible or if you have any idea I will be thankful Thank you -- View this message in context: http://squid-web-proxy-cache.1019090.n4.nabble.com/ACL-in-SQUID-tp2195830p2197299.html Sent from the Squid - Users mailing list archive at Nabble.com.