If a legacy application is using RPG II to write data files to an iSeries 400 machine, are the files flat files instead of database files? If so, and the system has a security level of 20, how secure are these files? This environment is running OS/400 version 3 and an old application on top of it.
The files are, more than likely, not secure at all. The problem with security level 20 is that, by default, all users are created with *ALLOBJ special authority. This means that, by default, anyone can literally do anything to all objects - files, libraries, etc on the system. For example, files can be deleted or updated, programs can be replaced or production data copied to a PC and sold to a competitor. Needless to say, this is a dangerous situation. You can remove *ALLOBJ from user profiles at security level 20. If you do that for all profiles, you are essentially running with the same protection as security level 30. But before you can remove the *ALLOBJ, you have to have a scheme for users to get the authority they need to the data so they can still do their jobs.
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