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Rob, I don't see how disable device would have any effect unless
you're not auto creating virtual devices...

If you aren't auto creating virtual devices, then I don't see a
concern with disabling both....

A user would have to not only keep switching profiles but switch
workstations also...

Charles

On Wed, Mar 23, 2011 at 1:13 PM, <rob@xxxxxxxxx> wrote:
We had "yet another security audit".  This time we are getting dinged
because we have QMAXSGNACN sent to 1=Disable device.  It is recommended
that we use 3=Disable device and profile.  Their concern is that someone
could mount a Denial Of Service attack on us and disable all of our
virtual devices.  My thought is, that if I set it to disable user profiles
wouldn't that just expand the DOS attack to include user profiles also?
Let's see, sign on 3 times and disable QSECOFR, then try QSYSOPR and
several others.  Granted, you could use this to recover QSECOFR (which is
quite drastic)
http://publib.boulder.ibm.com/infocenter/iseries/v6r1m0/topic/rzamh/rzamhrecover.htm
or you could sign on as someone else with that level of authority and
reset it there.

Anyone with command line access can do a
wrkobj qusrsys/*all *msgq
and get a list of all your user profiles.  I just signed on as this user
crtusrprf dummy
and was able to perform that.  (Please do not take offense at the user
name - it's just a habit of mine.  The operator knows to kill it on
sight.)

Rob Berendt
--
Group Dekko
Dept 1600
Mail to:  2505 Dekko Drive
         Garrett, IN 46738
Ship to:  Dock 108
         6928N 400E
         Kendallville, IN 46755
http://www.dekko.com

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