I come back to this older thread. My constellation is the same: There is a Nethserver AD controller inside the LAN and a NS webserver in the DMZ. Connecting from the webserver to the AD LDAP does not give me any errors. The credentials have been tested with LDAP-Admin and are okay. But the user and group list are empty.
Btw, there is no slapd service in the Network services list.
Any idea?