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To: "cygwin AT cygwin DOT com" <cygwin AT cygwin DOT com>
Subject: RE: trouble maintaining an open ssh connection past 20 minutes
Thread-Topic: trouble maintaining an open ssh connection past 20 minutes
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Date: Fri, 5 Jun 2020 15:26:54 +0000
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From: "Frances B. Webb via Cygwin" <cygwin AT cygwin DOT com>
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My ssh config is this, followed by a bunch of hostname aliases:

Host *
        ServerAliveInterval 180
Host solr* jenkins folio*
        IdentityFile ~/.ssh/aws_id_rsa

The ServerAliveInterval is something I added when I was trying to debug the issue last summer. It didn't work, and I never took it out.

The servers that I'm communicating with are a combination of Amazon Web Services hosted and on-campus server farm machines. Both sets are virtual machines, if that makes any difference. I did ask last summer, and all I got from our operations people was an assurance that they definitely didn't set up the servers to limit ssh sessions to 20 minutes. If there are specific misconfigurations that someone can suggest I check or ask them about, I'd be happy to pursue that further. Out-of-date server software is worth looking into if there are known incompatibilities.

-----Original Message-----
From: matthew patton <pattonme AT yahoo DOT com> 
Sent: Friday, June 5, 2020 11:12 AM
To: Frances B. Webb <frances DOT webb AT cornell DOT edu>
Subject: Re: trouble maintaining an open ssh connection past 20 minutes

post your ssh config. specifically if you're doing heartbeat packets and loss threshold. And also have you talked to your firewall admins? 

eg.
  ServerAliveInterval 90
  ServerAliveCountMax 3

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