The problem only seems to appear if we close the 3270 window, instead of
using #cp disc. If memory serves me (which is always doubtful), we have been
using the "close the window" method for several years, under the assumption
that (since the days of modems), CP allows a machine to keep running (as
long as it has SET RUN ON) when it's console connection is broken, even if
it's running a 2nd level OS.

Do I mis-remember the design?

Regards,
DJ
THANK YOU for deleting my address (unless it is pertinent), all other
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-----Original Message-----
From: Linux on 390 Port [mailto:[email protected]] On Behalf Of Alan
Altmark
Sent: Wednesday, October 15, 2014 1:07 AM
To: [email protected]
Subject: Re: can't SSH after 3270 disconnect

On Tuesday, 10/14/2014 at 12:23 EDT, Doug <[email protected]> wrote:
> Could it be that the guest is getting sent an interrupt when the
terminal
> disconnects and the guest interpreted it as shutdown reboot now.
> I forget where to check this but am sure the masters on this list know.

Network traces are the only reasonable way to solve this problem.  Divide
and conquer, as I said previously. Get simultaneous tcpdumps of the end
user machine, the VPN server, and the target Linux machine.  You're
looking for the SYN, SYN/ACK, ACK open sequence (e.g. on port 22 for ssh).
  If you don't see them flowing from one end to the other, then you know
where to look for the culprit.

Or just hand it to some network techs to deal with.

Alan Altmark

Senior Managing z/VM and Linux Consultant
Lab Services System z Delivery Practice
IBM Systems & Technology Group
ibm.com/systems/services/labservices
office: 607.429.3323
mobile; 607.321.7556
[email protected]
IBM Endicott

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