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I worked at a State agency some years ago where the action was to disable profile and device. What a pain that was. Besides, it could be a self-inflicted DOS attack, if device is disable and profile is not. So much simpler to only disable the profile. Still secure.

John McKee

-----Original message-----
From: rob@xxxxxxxxx
Date: Wed, 23 Mar 2011 12:50:49 -0500
To: Midrange Systems Technical Discussion midrange-l@xxxxxxxxxxxx
Subject: Re: QMAXSGNACN

Interesting. I'll keep that in mind about QSECOFR being able to use the
system console even when disabled. Does it bark at you and warn you?
There's so much that depends on QSECOFR not being disabled that I would
like to know it is disabled.
From the console:
chgusrprf qsecofr status(*disabled)
SIGNOFF
Signed on as QSECOFR.
DSPMSG QSYSOPR. Nothing.
DSPMSG QSECOFR. Nothing.
DSPLOG PERIOD((1335)). Nothing.
DSPJOBLOG. Nothing.
From another session:
CPF1394 User profile QSECOFR cannot sign on.
Back at console
chgusrprf qsecofr status(*enabled)
User profile QSECOFR changed.
Granted, if it was disable via QMAXSGNACN there would be one message in
QSYSOPR.
My concern is that a coworker could assist me with one of my downtime
weekends, disable QSECOFR and I not know it. Then stuff stops working and
I waste time trying to figure if it was some new ptf or some such thing.

Right now, if the device is disabled after 3 tries, and the device happens
to be one of our wireless scanners, then Message Labs will vary the device
back on for 5 tries. Effectively raising QMAXSIGN for just those devices
to 15 (3 x 5). I could work with that.

I still do not like them being able to disable ROB, PEGGY, CHRIS and a
host of others so easily though.


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





From: bdietz400@xxxxxxxxx
To: Midrange Systems Technical Discussion <midrange-l@xxxxxxxxxxxx>
Date: 03/23/2011 01:26 PM
Subject: Re: QMAXSGNACN
Sent by: midrange-l-bounces@xxxxxxxxxxxx



I prefer disable profile only. I've had too many occasions were the
console
got varied off while at restricted state.

Remember that even if QSECOFR is disabled it can still signon at the
console.

Bryan



On Mar 23, 2011 1:13pm, 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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