Hi All, I am a newbie to Linux and squid and require some assistance please. I am running a server on CENTOS release 5.2 (Final), and have configured squid (2.6.STABLE21-3) for ldap group authentication with Active Directory. I have seen in the man page for the squid_ldap_group there is an -S option to strip the NT domain name from the username. I have added the -S to our squid.conf file, squid_ldap_group section however this does not seem to strip the domain name as from the access.log file I can see that squid still passes the domain\username through to AD which then fails. Please find my squid authentication configuration below. auth_param basic program /usr/lib64/squid/squid_ldap_auth -R -b "dc=domnet,dc=bbd,dc=co,dc=za" -D "cn=administrator,cn=Users,dc=domnet,dc=bbd,dc=co,dc=za" -w "password" -f sAMAccountName=%s -h 10.3.1.216 auth_param basic children 5 auth_param basic realm Your Organisation Name auth_param basic credentialsttl 1 hour external_acl_type InetGroup ttl=60 %LOGIN /usr/lib64/squid/squid_ldap_group -R -b "dc=domnet,dc=bbd,dc=co,dc=za" -D "cn=administrator,cn=Users,dc=domnet,dc=bbd,dc=co,dc=za" -w "password" -f "(&(objectclass=person)(sAMAccountName=%v) (memberof=cn=%a,ou=SquidUsers,dc=bbdnet,dc=bbd,dc=co,dc=za))" -S -h 10.3.1.216 acl InetAccess external InetGroup SquidUsersAllow Please if anyone has any insight into what I might be missing please let me know. Thank you, Clayton York