Hi! I'm trying to use group names that include white spaces (such as "Group Name") with external auths. I got some ACLs defined like this: external_acl_type ldap_group %LOGIN /usr/lib/squid/squid_ldap_group -W /etc/squid/squid_ldap.secret -D "cn=Manager,dc=test,dc=local" -b "ou=Internet,ou=Groups,dc=test,dc=local" -f "(&(objectclass=posixGroup)(cn=%g)(memberUid=%u))" -h 127.0.0.1 -P -v 3 -B "ou=People,ou=Users,dc=test,dc=local" acl group_name external ldap_group Group%20Name acl anotheracl external ldap_group anothergroup http_access allow group_name http_access allow anotheracl http_access deny all It actually works for anotheracl (which doesn't have white spaces) , but it doesn't for group_name. The problem: the white space. If I get that string and feed that directly to the squid_ldap program, it works!, I tried this: run: /usr/lib/squid/squid_ldap_group -W /etc/squid/squid_ldap.secret -D "cn=Manager,dc=test,dc=local" -b "ou=Internet,ou=Groups,dc=test,dc=local" -f "(&(objectclass=posixGroup)(cn=%g)(memberUid=%u))" -h 127.0.0.1 -P -v 3 -B "ou=People,ou=Users,dc=test,dc=local" type: user1 Group%20Name and it answered: OK off course, user1 is a member of "Group Name" So, the %20 trick should work, but then.... from the squid.conf , it doesn't. I also tried these variations without success: acl group_name external ldap_group Group Name acl group_name external ldap_group Group\ Name acl group_name external ldap_group "Group Name" acl group_name external ldap_group Group%%20Name acl group_name external ldap_group Group\%20Name Any ideas? Thanks in advance, Ildefonso Camargo