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To: Soren <somian08@gmail.com>, cygwin@cygwin.com
Subject: Re: sshd times out and disconnects client
Message-ID: <eb4f5785-f6ae-ad0b-0ebf-25faaae64c61@mindspring.com>
Date: Fri, 28 Mar 2025 18:42:02 +0000
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From: "C. Linus Hicks via Cygwin" <cygwin@cygwin.com>
Reply-To: "C. Linus Hicks" <linush@mindspring.com>
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Sender: "Cygwin" <cygwin-bounces~archive-cygwin=delorie.com@cygwin.com>

On the server side, you can update the sshd_config file and set the value of the ClientAliveInterval to a non-zero value, like 60 seconds. Or you can set the ServerAliveInterval option to a similar value in your client options, either on the command line or in your local config file.

-----Original Message-----
From: Soren <somian08@gmail.com>
Sent: Mar 28, 2025 2:25 PM
To: <cygwin@cygwin.com>
Subject: sshd times out and disconnects client

Hello Cygwinstas,

I've got a question about the cygwin ssh daemon running on Windows. I don't
know if there is a setting in sshd or in Windows that would alter the
behavior I am seeing. That's what I am hoping for.

When logging in from a Linux system to my Windows 10 box, there's a timeout
(of what duration, I am not precisely sure, maybe after 2 hours?) if I am
not doing anything over the ssh connection. The session is disconnected at
the server end. I find this a bit annoying. I might want to be doing
something else for a couple hours and then come back to the session, only
to find it's disconnected. This is in contrast to the reverse case, where I
am logging in to one of my Linux boxes from Windows: in that case, the
connection stays alive until I deliberately close it. The same with
sessions between Linux machines. It's only in the case of incoming
connections to sshd on cygwin/windows that I am seeing this.

Insights greatly appreciated.
Regards,
Your fellow loyal Cygwinista, Soren Andersen

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