IBM Systems Magazine, Power Systems - IBM i digital edition, February 2009 - 42

Administrator Getting the most from your systems Using Session Timeouts to Control Unauthorized Activity BY MICHAEL RYAN U nattended interactive sessions can be a disgruntled employee’s workshop. Think of an unattended green-screen device (terminal, PC running iSeries* Access, etc.), signed onto by a valid user who then leaves the desk for a few minutes or, commonly, a lunch hour. Any other employee with physical access to the device could access any program, menu option, function, file or database that the original user can access. The employee could run payroll checks (perhaps a special payroll of one check), schedule deliveries (merchandise delivered to a friend’s house) or some other legitimate business function. Another consideration is that an interactive session that’s signed onto and unattended could be locking a record or file that another process needs. Our programs should account for this possibility, but if the unattended interactive session weren’t using resources, the lock situation wouldn’t exist. Administrators need to provide a mechanism to stop unauthorized access to unattended interactive sessions. If users have PCs, the timeout screen saver feature is a good option. But the interactive session itself can also be monitored for a timeout condition, where if the session is idle for a designated period, an action can be taken. In this article, I identify the system values that control timeouts and provide some sample code that can help manage timeouts or inactivity. System Values Two system values control the inactivity processing for interactive sessions. The QINACTITV (inactivity time) system value determines the inactivity or timeout value. This is the amount of time (in minutes) that an interactive session can be inactive before the system performs an action. The shipped value is *NONE, meaning there’s no inactivity timer. The allowable range is five to 300 minutes. The other system value involved in inactivity or timeout 42 FEBRUARY 2009 ibmsystemsmag.com/ibmi processing is QINACTMSGQ (the inactive message queue). This system value identifies the action to be performed when the inactivity timeout value (specified in QINACTITV) is reached. In other words, when a workstation session has been idle for the specified inactivity time, the action specified in QINACTMSGQ occurs. You can specify one of three actions: *ENDJOB, which ends the interactive session; *DSCJOB, which disconnects the interactive session; or a message queue name designating Message CPI1126 to be sent to the specified message queue. The first two options are pretty straightforward. *ENDJOB ends the interactive session and will also end any secondary or group jobs. This is effective, but it may cause system problems with jobs being ended with open files or uncommitted transactions and the like. *DSCJOB disconnects the interactive session. Users can sign on and be right back where they were when their interactive sessions were disconnected. This ameliorates the possible problems of ending the interactive session but may not provide the benefits of unlocking files obtained when ending the interactive session. In either case, these two options are systemwide. The specified value controls all interactive sessions. That may not be a problem for your shop, but think about this—if the vice president of IT wants her session to never be ended or disconnected because of inactivity, you can’t achieve that by specifying *ENDJOB or *DSCJOB. Instead, you’d need a way to identify the user (and perhaps job or workstation), and then make an intelligent decision. You can do that by specifying the third possible parameter for this system value—the name (and library) of a message queue that receives the CPI1126 message. Using the Message Queue Approach The message queue used for interactive processing is standard, created with the Create Message Queue
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IBM Systems Magazine, Power Systems - IBM i digital edition, February 2009

Table of Contents for the Digital Edition of IBM Systems Magazine, Power Systems - IBM i digital edition, February 2009

IBM Systems Magazine, Power Systems - February 2009
Table of Contents
In Box: Letters to the Editor
Editor's Desk
Lessons from the Lab:  Why should you Use Application Logging
Case Study:  A Logistical Dream
Cover Story:  Next Stop:  Open Source
Feature:  The DB2 Storage Engine for my SQL Integrates Data Access and Management.
Tips & Techniques:  How to Stop Good Software From Going Bad
Developer: IBM Rational Team Concert for i Debuts
Administrator:  Using Session Timeouts To Control Unauthorized Activity
Technical Corner:  IBM i 6.1: Introduces Virtual Optical Media Enhancements
Product News
Advertiser Index
ENDPGM:  IBM i is Ken Jack's Weapon of Choice
IBM Systems Magazine, Power Systems - IBM i digital edition, February 2009 - IBM Systems Magazine, Power Systems - February 2009
IBM Systems Magazine, Power Systems - IBM i digital edition, February 2009 - Cover2
IBM Systems Magazine, Power Systems - IBM i digital edition, February 2009 - 1
IBM Systems Magazine, Power Systems - IBM i digital edition, February 2009 - Table of Contents
IBM Systems Magazine, Power Systems - IBM i digital edition, February 2009 - 3
IBM Systems Magazine, Power Systems - IBM i digital edition, February 2009 - 4
IBM Systems Magazine, Power Systems - IBM i digital edition, February 2009 - 5
IBM Systems Magazine, Power Systems - IBM i digital edition, February 2009 - 6
IBM Systems Magazine, Power Systems - IBM i digital edition, February 2009 - 7
IBM Systems Magazine, Power Systems - IBM i digital edition, February 2009 - In Box: Letters to the Editor
IBM Systems Magazine, Power Systems - IBM i digital edition, February 2009 - 9
IBM Systems Magazine, Power Systems - IBM i digital edition, February 2009 - Editor's Desk
IBM Systems Magazine, Power Systems - IBM i digital edition, February 2009 - 11
IBM Systems Magazine, Power Systems - IBM i digital edition, February 2009 - Lessons from the Lab:  Why should you Use Application Logging
IBM Systems Magazine, Power Systems - IBM i digital edition, February 2009 - 13
IBM Systems Magazine, Power Systems - IBM i digital edition, February 2009 - Case Study:  A Logistical Dream
IBM Systems Magazine, Power Systems - IBM i digital edition, February 2009 - 15
IBM Systems Magazine, Power Systems - IBM i digital edition, February 2009 - 16
IBM Systems Magazine, Power Systems - IBM i digital edition, February 2009 - 17
IBM Systems Magazine, Power Systems - IBM i digital edition, February 2009 - 18
IBM Systems Magazine, Power Systems - IBM i digital edition, February 2009 - 19
IBM Systems Magazine, Power Systems - IBM i digital edition, February 2009 - Cover Story:  Next Stop:  Open Source
IBM Systems Magazine, Power Systems - IBM i digital edition, February 2009 - 21
IBM Systems Magazine, Power Systems - IBM i digital edition, February 2009 - 22
IBM Systems Magazine, Power Systems - IBM i digital edition, February 2009 - 23
IBM Systems Magazine, Power Systems - IBM i digital edition, February 2009 - 24
IBM Systems Magazine, Power Systems - IBM i digital edition, February 2009 - 25
IBM Systems Magazine, Power Systems - IBM i digital edition, February 2009 - Feature:  The DB2 Storage Engine for my SQL Integrates Data Access and Management.
IBM Systems Magazine, Power Systems - IBM i digital edition, February 2009 - 27
IBM Systems Magazine, Power Systems - IBM i digital edition, February 2009 - 28
IBM Systems Magazine, Power Systems - IBM i digital edition, February 2009 - 29
IBM Systems Magazine, Power Systems - IBM i digital edition, February 2009 - 30
IBM Systems Magazine, Power Systems - IBM i digital edition, February 2009 - 31
IBM Systems Magazine, Power Systems - IBM i digital edition, February 2009 - 32
IBM Systems Magazine, Power Systems - IBM i digital edition, February 2009 - 33
IBM Systems Magazine, Power Systems - IBM i digital edition, February 2009 - Tips & Techniques:  How to Stop Good Software From Going Bad
IBM Systems Magazine, Power Systems - IBM i digital edition, February 2009 - 35
IBM Systems Magazine, Power Systems - IBM i digital edition, February 2009 - 36
IBM Systems Magazine, Power Systems - IBM i digital edition, February 2009 - 37
IBM Systems Magazine, Power Systems - IBM i digital edition, February 2009 - Developer: IBM Rational Team Concert for i Debuts
IBM Systems Magazine, Power Systems - IBM i digital edition, February 2009 - 39
IBM Systems Magazine, Power Systems - IBM i digital edition, February 2009 - 40
IBM Systems Magazine, Power Systems - IBM i digital edition, February 2009 - 41
IBM Systems Magazine, Power Systems - IBM i digital edition, February 2009 - Administrator:  Using Session Timeouts To Control Unauthorized Activity
IBM Systems Magazine, Power Systems - IBM i digital edition, February 2009 - 43
IBM Systems Magazine, Power Systems - IBM i digital edition, February 2009 - 44
IBM Systems Magazine, Power Systems - IBM i digital edition, February 2009 - 45
IBM Systems Magazine, Power Systems - IBM i digital edition, February 2009 - Technical Corner:  IBM i 6.1: Introduces Virtual Optical Media Enhancements
IBM Systems Magazine, Power Systems - IBM i digital edition, February 2009 - 47
IBM Systems Magazine, Power Systems - IBM i digital edition, February 2009 - 48
IBM Systems Magazine, Power Systems - IBM i digital edition, February 2009 - 49
IBM Systems Magazine, Power Systems - IBM i digital edition, February 2009 - 50
IBM Systems Magazine, Power Systems - IBM i digital edition, February 2009 - 51
IBM Systems Magazine, Power Systems - IBM i digital edition, February 2009 - Product News
IBM Systems Magazine, Power Systems - IBM i digital edition, February 2009 - 53
IBM Systems Magazine, Power Systems - IBM i digital edition, February 2009 - 54
IBM Systems Magazine, Power Systems - IBM i digital edition, February 2009 - Advertiser Index
IBM Systems Magazine, Power Systems - IBM i digital edition, February 2009 - ENDPGM:  IBM i is Ken Jack's Weapon of Choice
IBM Systems Magazine, Power Systems - IBM i digital edition, February 2009 - Cover3
IBM Systems Magazine, Power Systems - IBM i digital edition, February 2009 - Cover4
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