PPP auth via external LDAP?

Hi there, I’m Googling whole day but cannot find exact answer on LDAP authentification.

Is there any way how can Mikrotik HW router can authenticase users (for me VPN - PPP users) via external LDAP server?
In my scenario, there is Mikrotik and Synology NAS, on which is running LDAP server.
There is no other computer with Radius server and I want to keep just these two machines.
I just installed User Manager package on my MT, but cannot find any way how to authenticate via LDAP.

Any ideas?
Thank you very much for answers.

Hi.

If the LDAP ‘source’ is actually Microsoft Active Directory - then look at using Microsoft’s IAS feature set as that’s technically a radius and I guess it could work - I have not tested that.

The other option is to use something like FreeRadius with OpenLDAP behind it - something along the lines of this: http://mhoran.wordpress.com/2007/11/25/freeradius-on-freebsd-and-openldap/

Thanx, regardtv,

but it actually didn’t answered my question.
(NO, I dont have MS Windoz and NO I don’t want to have another server)