I once suggested to management that we secure our z/OS user profiles.  At the 
time they were used as EMAIL addresses as well. I explained the scenario of 
"rotating IDs" as Mike suggested it could lead to a DoS exploitation.  
Naturally the EMAIL people prevailed.....sigh.

 

-----Original Message-----
From: IBM Mainframe Discussion List [mailto:IBM-MAIN@LISTSERV.UA.EDU] On Behalf 
Of Mike Schwab
Sent: Monday, January 05, 2015 2:21 PM
To: IBM-MAIN@LISTSERV.UA.EDU
Subject: Re: CANCEL TSO Logon?

On Mon, Jan 5, 2015 at 9:45 AM, Vernooij, CP (ITOPT1) - KLM 
<kees.verno...@klm.com> wrote:
> What is the point in trying to find a valid userid, if the userid will be 
> suspended after trying 3 invalid passwords (in our situation)?
>
> Kees.
>
But not if you keep rotating IDs.  It is three in a row for the same ID.

--
Mike A Schwab, Springfield IL USA
Where do Forest Rangers go to get away from it all?

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