Hi experts, I'm new member in LDAP. Although I've finished configured a Linux server qmail - ldap but I still have some points unclear, let's I explain: For example, I have a lap using some services require authenticate, ex: qmail, radius, ftp, ... I want to save the user information (username, password, ... ) in only one place, so I decided to using LDAP. (number of users are quite large) But after implement qmail-ldap (it now runs good), I don't know how to continue to implement radius service (or other services). Reason is I can't integrate the radius information into qmail database (although I included qmail.schema and radius.schema in slapd.conf). The question: is there a way to integrate data of one schema in to an existed schema? I want to design a structure like this: [qmail information] [radius information] [other service ....] \ | / \ | / \ | / \ | / [common user information] (username, password) Do I have to write my own schema for doing this? (Schema that include both [qmail service information] and [radius service information]) Please give me an advice how to solve this? Thanks, -- Phan Dang Duy Thinh