The illustrative embodiments provide for filtering LDAP requests and server responses. A viewport server is configured with filtering rules for responses from a directory server where the responses are generated to fulfill requests from a client application. The filtering rules determine which data is to be forwarded to the client application. One or more responses are intercepted from the directory server to the client application. The one or more intercepted responses are filtered according to the filtering rules to produce a set of filtered responses. The set of filtered responses are then sent to the client application.