Configuration for LDAP Authentication in Odoo 9

I need someone to give me instructions and guidance on how to configure LDAP authentication in Odoo 9. Server Environment: 1st server: Odoo 9 application hosted in Amazon EC2 2nd server: LDAP server hosted in my Synology NAS which is in my office's local area network Things that I have done so far: 1. I have installed the Authentication via LDAP (auth_ldap) module in Odoo. Already in stalled Python's ldap module in the server. 2. Configured LDAP Parameters in Odoo (see attach: [login to view URL]). Note: Actual IP address and domain were altered due to security issue. Need someone to check if the configuration values are entered correctly. 3. Open the port 389 in my office network to public and forwarded it to the LDAP server. 4. Tested using 'ldapsearch' command line (see attach: [login to view URL]) in Amazon EC2 to ensure that both servers can communicate. Despite I have done the things above, I am still not able to authenticate my LDAP users in Odoo 9. I need someone who has done a similar work before to guide me through. Take note, no login information will be given for the two servers. All you need to do is to give me instructions on the configuration.