OpenVPN with ldap authentication

[manjeet]

Hi, I am using openvpn with users authenticating with local ldap server. My ldap server is UCS (univention cooperate server).

So everything is configured and VPN is working all well. The issue is that if i using "Authentication containers" as the basic first level name i.e. "CN=Users,DC=DOMAIN_NAME,DC=LOCAL" then it is working fine. For any other next group or container does not work.

I have tried these and are failing to authenticate:
1. CN=VPN_GROUP,CN=groups,DC=DOMAIN_NAME,DC=LOCAL
2. CN=VPN_GROUP,CN=Users,DC=DOMAIN_NAME,DC=LOCAL

I only want tp allow my VPN Group to authenticate so please help.