OPTS="-h 'ldaps:// ldapi://%2fvar%2frun%2fopenldap%2fslapd.sock'"

There is no sock file on CentOS5. I also had to put 'bind_policy soft' in /etc/ldapd.conf otherwise ldap wouldn't start and hang forever but now just keeps dumping into logs :

Jan 22 23:43:46 hybrid runuser: nss_ldap: failed to bind to LDAP server ldap://domain.local/: Can't contact LDAP server Jan 22 23:43:46 hybrid runuser: nss_ldap: could not search LDAP server - Server is unavailable Jan 22 23:43:46 hybrid runuser: nss_ldap: failed to bind to LDAP server ldap://domain.local/: Can't contact LDAP server Jan 22 23:43:46 hybrid runuser: nss_ldap: could not search LDAP server - Server is unavailable Jan 22 23:43:46 hybrid slapd[16452]: nss_ldap: failed to bind to LDAP server ldap://domain.local/: Can't contact LDAP server Jan 22 23:43:46 hybrid slapd[16452]: nss_ldap: could not search LDAP server - Server is unavailable Jan 22 23:43:46 hybrid slapd[16452]: nss_ldap: failed to bind to LDAP server ldap://domain.local/: Can't contact LDAP server Jan 22 23:43:46 hybrid slapd[16452]: nss_ldap: could not search LDAP server - Server is unavailable