FTP with LDAP

Hi,

After a week i try to integrate ftp server with ldap authenticate, and not success. Here i post.

Our client have zimbra server with ldap database. So they request ftp server authenticate with ldap in zimbra.

Most likely user can use login as email to log-in ftp server and have their own folder eg: /pub/$user.

Ldap on zimbra and ftp server are separate server but same segment network.

Does anyone here success to do this?

LDAP
OS: RHEL 5.2

FTP
OS: Centos 6.3

Hope can get idea from forumers here.

Thanks.