I suppose, you can create ON CONNECT trigger and verify 'current_user' and client remote IP address against '127.0.0.1' (from MON$ATTACHMENTS table). If don't match - raise DB exception.
13.03.2019 9:06, cyc...@gmail.com wrote: > Can I restrict the sysdba to be able to login to firebird server on localhost > only? No. But you can remove SYSDBA account at all and let it use trusted auth or embeded mode.