Hello, I am trying to block Internet access for people member of one specific AD Security group called GSIFBENoInternetAccess but I get some issue with it. When I try the squid_ldap_group process from shell, the mechanism is working well. my service account correctly requests our Active Directory and gives the right response ERR/OK. When I try this mechanism from squid process, allow/deny is working well but before being blocked by squid_ldap_group I also receive an authentication popup box .. I simply press on CANCEL and receives the personalized error page. I have read on the net this may come from multiple authentication but I do not see this in my case and if this is the case thks to explain me what's wrong with this .. Is this coming from the line with ntlmauth just afterwards and how is this this possible to make this working without the authentication box ?? # my config ... auth_param ntlm program /usr/local/bin/ntlm_auth --helper-protocol=squid-2.5-ntlmssp auth_param ntlm children 32 auth_param ntlm keep_alive on acl ntlmauth proxy_auth REQUIRED ... external_acl_type gg_nointernet ttl=3600 children=8 %LOGIN /usr/local/bin/squid_ldap_group ... -p 389 -P -t 2 -c 3 -R -S + acl GSIFBENoInternetAccess external gg_nointernet GSIFBENoInternetAccess ... http_access deny GSIFBENoInternetAccess deny_info ERR_LDAP GSIFBENoInternetAccess http_access allow ntlmauth http_reply_access allow all http_access deny all many thks to help me. Vincent. ----------------------------------------------------------------- ATTENTION: The information in this electronic mail message is private and confidential, and only intended for the addressee. Should you receive this message by mistake, you are hereby notified that any disclosure, reproduction, distribution or use of this message is strictly prohibited. Please inform the sender by reply transmission and delete the message without copying or opening it. Messages and attachments are scanned for all viruses known. If this message contains password-protected attachments, the files have NOT been scanned for viruses by the ING mail domain. Always scan attachments before opening them. -----------------------------------------------------------------