On Mon, 5 Jan 2015 07:21:28 -0800, Charles Mills wrote:

>> For TSO, you can probe for known user ids, but you will see a lot of LOGON 
>> and IEA989I message in the SYSLOG.
>
>Only if you set a specific SLIP trap for this condition.
> 
In the video cited:

>On Jan 2, 2015, at 3:31 PM, Mark Regan wrote:
>>
>> Black Hat 2013 - Mainframes: The Past Will Come to Haunt You, by a
>> Philip Young and it's about an hour long.
>>
>> http://youtu.be/uL65zWrofvk

... the speaker opined that such probing is less likely to be detected by
Security than by Operations as a spike in CPU usage.

-- gil

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