[hercules-390] TN3270 session disconnected

[[e-mail] [hercules-390]]

If I connect to z/os under Hercules & Windows via a tn3270 client from a remote machine (I tried more than one), after a few minutes of being idle the session is reset.
This dows not happen for local sessions on the same machine where Hercules is running.
Is this caused by windows and is there a way to keep the session alive even if idle ?

[[e-mail] [hercules-390]]

If I connect to z/os under Hercules & Windows via a tn3270 client from a remote machine (I tried more than one), after a few minutes of being idle the session is reset.
This dows not happen for local sessions on the same machine where Hercules is running.
Is this caused by windows and is there a way to keep the session alive even if idle ?

[[e-mail] [hercules-390]]

Oh and there were some issues reported with “keep alives” on some builds



https://github.com/hercules-390/hyperion/issues/44



so it may be worth getting a current snapshot



Dave





From: hercules-***@yahoogroups.com [mailto:hercules-***@yahoogroups.com]
Sent: 03 April 2017 11:39
To: hercules-***@yahoogroups.com
Subject: [hercules-390] TN3270 session disconnected








If I connect to z/os under Hercules & Windows via a tn3270 client from a remote machine (I tried more than one), after a few minutes of being idle the session is reset.

This dows not happen for local sessions on the same machine where Hercules is running.

Is this caused by windows and is there a way to keep the session alive even if idle ?

[[e-mail] [hercules-390]]

Post by ***@yahoo.com [hercules-390]
If I connect to z/os under Hercules & Windows via a tn3270 client from
a remote machine (I tried more than one), after a few minutes of being
idle the session is reset.
This dows not happen for local sessions on the same machine where Hercules is running.
Is this caused by windows and is there a way to keep the session alive even if idle ?

What are your TCPIP PROFILE IDLE TIMEOUT and KEEPALIVE interval
set to?

[[e-mail] [hercules-390]]

Running Hercules 3.12 on Windows 10. I tried both QWS3270 and also x3270.
Tried different values of CONKPALV and it didn't help.


I don't see any TCPIP PROFILE IDLE TIMEOUT and KEEPALIVE values so I guess those
are set to default. Should I change them?

[[e-mail] [hercules-390]]

I found this article in IBM Support:

http://www-01.ibm.com/support/docview.wss?uid=swg21269806 http://www-01.ibm.com/support/docview.wss?uid=swg21269806



Are TIMEMARK & SCANINTERVAL relevant to my problem?

[[e-mail] [hercules-390]]

I shut down the windows Firewall and the sessions keep dropping. So not the Firewall's fault.

[[e-mail] [hercules-390]]

It just occurred to me that I should shut down the firewall on both ends. Once I did that it seems the session stays active. waited 15 min and still good. Is there a way to configure the windows firewall not do reset idle connections ? or should I try
to lower the SCANINTERVAL and TIMEMARK ?

[Tony Harminc [e-mail] [hercules-390]]

Post by ***@yahoo.com [hercules-390]
It just occurred to me that I should shut down the firewall on both ends.
Once I did that it seems the session stays active. waited 15 min and still
good.

I've had similar problems at work using a VPN/firewall combo. After <a
while> the firewall discards its knowledge of the TCP connection, and then
the next attempt by the z/OS end to send (unsolicited and therefore
unauthorized, in the firewall's opinion) data to the TN3270 client fails.
In my case this was a Checkpoint firewall of some sort, but I don't manage
either that firewall or that z/OS system. It ws fixed (fsvo fixed) long
ago, but still very occasionally recurs.

Tony H.

[[e-mail] [hercules-390]]

The session still gets dropped after 15-20 min when idle. Are there any Windows configuration options that might be causing this to happen?

[[e-mail] [hercules-390]]

1. Please click on the option to include the previous message when replying. I have no idea to which message this is a reply to so no ideas what you have tried.
2. I still have no idea which Hercules and which windows you are talking about.
3. The only thing I can think of is the power management options. Unless you are running on a server windows will go to sleep and power down the network card.



Dave



From: hercules-***@yahoogroups.com [mailto:hercules-***@yahoogroups.com]
Sent: 04 April 2017 07:54
To: hercules-***@yahoogroups.com
Subject: [hercules-390] Re: TN3270 session disconnected





The session still gets dropped after 15-20 min when idle.

Are there any Windows configuration options that might be causing this to happen?

[[e-mail] [hercules-390]]

I thought I provided the following yesterday:

Running Hercules 3.12 on Windows 10. I tried both QWS3270 and also x3270.
Tried different values of CONKPALV and it didn't help.

[[e-mail] [hercules-390]]

Post by ***@yahoo.com [hercules-390]
Running Hercules 3.12 on Windows 10. I tried both QWS3270 and
also x3270.
Tried different values of CONKPALV and it didn't help.

Are you using QWS3270Plus, QWS3270Secure, or the
really old QWS3270 that was free?
If one of the first two, how did you configure the Keep
Alive options under Session then Connection ?
Interval ?
Use TCPIP ?
Use NOP ?

['John P. Hartmann' [e-mail] [hercules-390]]

Open an issue. This has a number of advantages:

1. Those who are not interested can silence the issue.
2. Context is immediately available in the browser interface.
3. You can still append to the issue using the mail interface, if
you're "mark-down challenged".

Please do not clutter the forum with tons of history.

Thanks,

1. Please click on the option to include the previous message when
replying. I have no idea to which message this is a reply to so no
ideas what you have tried.

[[e-mail] [hercules-390]]

Open an Issue where ? Never done that before. Sorry for the ignorance.

[Joe Monk [e-mail] [hercules-390]]

On the www.hercules-390.eu website, you will find a link to the SPINHAWK
repository on GitHub.

When you head there, you will find the "Issues" tab.

Joe

On Tue, Apr 4, 2017 at 6:17 AM,

Post by ***@yahoo.com [hercules-390]
Open an Issue where ?
Never done that before. Sorry for the ignorance.

[[e-mail] [hercules-390]]

Is this actually a Hercules issue. Is the IP stack in Hercules, or the IP stack in the guest OS in use?



From: hercules-***@yahoogroups.com [mailto:hercules-***@yahoogroups.com]
Sent: 04 April 2017 13:20
To: hercules-***@yahoogroups.com
Subject: Re: [hercules-390] Re: TN3270 session disconnected








On the www.hercules-390.eu <http://www.hercules-390.eu> website, you will find a link to the SPINHAWK repository on GitHub.



When you head there, you will find the "Issues" tab.



Joe



On Tue, Apr 4, 2017 at 6:17 AM, ***@yahoo.com <mailto:***@yahoo.com> [hercules-390] <hercules-***@yahoogroups.com <mailto:hercules-***@yahoogroups.com> > wrote:



Open an Issue where ?

Never done that before. Sorry for the ignorance.

[[e-mail] [hercules-390]]

I don't know what component is dropping the session. It only happens when connecting from a remote 3270 emulator client.
I connected many times from windows to a real remote z/os and never had this issue so probably
windows is not the culprit.

[Ivan Warren [e-mail] [hercules-390]]

Dear ahngb4nond2fjs4iv3chtuacfjmf4dgzileuxli7,

We still don't know if you are connecting to the z/OS Telnet server or
to the hercules 3174 - OSA/IOCC emulation.

That would help a bit Mr ahngb4nond2fjs4iv3chtuacfjmf4dgzileuxli7.

--Ivan

Post by ***@yahoo.com [hercules-390]
I don't know what component is dropping the session.
It only happens when connecting from a remote 3270 emulator client.
I connected many times from windows to a real remote z/os and never
had this issue so probably
windows is not the culprit.

[Non-text portions of this message have been removed]

[[e-mail] [hercules-390]]

If it's the z/OS stack, you should see an LU disconnect message and at the end will be the reason, so if it says TIMEMARK then you know it's the host. Otherwise it likely isn't.

---In hercules-***@yahoogroups.com, <***@...> wrote :

I don't know what component is dropping the session. It only happens when connecting from a remote 3270 emulator client.
I connected many times from windows to a real remote z/os and never had this issue so probably
windows is not the culprit.

[[e-mail] [hercules-390]]

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