While everyone likes to feel special, we need to be more selective when it comes to data access. As we discussed last month, many users have privileges far beyond their business requirements and simply need to have their access reduced to more reasonable levels.

Ask any security professional which area of IBM i security is most often ignored and chances are that the unanimous response is a chorus of “the Integrated File System.” Although it’s been around since V3R1, the Integrated File System, or IFS, remains a shrouded mystery that represents significant risk to many IBM i organizations.

A user’s ability to execute commands in a green-screen environment is controlled by the limit capabilities (LMTCPB) parameter on their profile. Although without exit programs to extend IBM i security functions, even limited capability users could invoke commands through network interfaces such as FTP.

Introduced by IBM to support TCP/IP services, a profile swap allows a job to change midstream and run under a different profile than the one that started it.

Does this sound familiar? You recently experienced an “unplanned outage” after an administrator inadvertently issued a PWRDWNSYS command while mentoring a new operator.