UNIX for Advanced & Expert Users

I am struggling with finding a way of securing a unix folder by controlling access to it by a LDAP Group.

In simpler terms,I am looking forward to see a username password prompt,when a specific unix folder is accessed.
That UserID and password ,should be authenticated by a secure directory (via LDAP).There should be no other way of accessing the folder.

Any help on this will be appreciated.

Thanks,
Sunil

Hey,
You will require to write a program which will just provide an environment to accomplish this task. What kind of folder access you want? You will need to run your shell inside that program. You can simply pass all user commands to your shell except some which you want authentication. When your restrictive command will occur, then you can take help from pam_ldap and supply required information and get user authorised. Once user authenticated you can allow him for all further task.