ldap_sasl_bind(SIMPLE): Can't contact LDAP server (-1)

[root@ldaptest openldap]# ldapadd -x -D "cn=admin,dc=ultrapower,dc=com" -W -f /tmp/base.ldif
Enter LDAP Password:
ldap_sasl_bind(SIMPLE): Can't contact LDAP server (-1)
[root@ldaptest openldap]# ldapadd -x -D "cn=admin,dc=ultrapower,dc=com" -W -f /tmp/group.ldif
Enter LDAP Password:
ldap_sasl_bind(SIMPLE): Can't contact LDAP server (-1)

出現這個錯誤的時候，查看服務和端口都已經開啟了，需要你手動指定主機名和你的端口號（ldap端口號為389），使用-h 加上主機名。

[root@ldaptest openldap]#  ldapadd -x -D "cn=admin,dc=ultrapower,dc=com" -W -f /tmp/base.ldif -h ldaptest.ultrapower.com -p 389
Enter LDAP Password: 
adding new entry "dc=ultrapower,dc=com"

adding new entry "ou=Hosts,dc=ultrapower,dc=com"

adding new entry "ou=Rpc,dc=ultrapower,dc=com"

adding new entry "ou=Services,dc=ultrapower,dc=com"

adding new entry "nisMapName=netgroup.byuser,dc=ultrapower,dc=com"

adding new entry "ou=Mounts,dc=ultrapower,dc=com"

adding new entry "ou=Networks,dc=ultrapower,dc=com"

adding new entry "ou=People,dc=ultrapower,dc=com"

adding new entry "ou=Group,dc=ultrapower,dc=com"
……