DomainKey-Signature: a=rsa-sha1; c=nofws; d=sourceware.org; h=list-id
	:list-unsubscribe:list-subscribe:list-archive:list-post
	:list-help:sender:mime-version:in-reply-to:references:from:date
	:message-id:subject:to:content-type; q=dns; s=default; b=Y0wiyv5
	ky3PK6eOK/Flu1zaeklEIZZg4ucWxWZ1ZEZrSnY/GMTLjCsbE3DNfgivJyCpzg6D
	rPWPet4kCveOdpCsMOs2L9IhiALJzTt/NR7hUOlgpSUeDm/lshngSshIZNI1hz6o
	ziw7To4C+WnzV8o1jWp/Q51iDL5x8o/J35O4=
Mailing-List: contact cygwin-help AT cygwin DOT com; run by ezmlm
Sender: cygwin-owner AT cygwin DOT com
Mail-Followup-To: cygwin AT cygwin DOT com
MIME-Version: 1.0
In-Reply-To: <announce.20161220204451.GA11925@calimero.vinschen.de>
References: <announce DOT 20161220204451 DOT GA11925 AT calimero DOT vinschen DOT de>
From: Ismail Donmez <ismail AT i10z DOT com>
Date: Tue, 20 Dec 2016 23:46:13 +0100
Message-ID: <CAFo71_6_9qrgn8L5Zg=m+_3pUz53SB321XPnAUuqJ=Ss+12-yg@mail.gmail.com>
Subject: Re: [ANNOUNCEMENT] Updated: OpenSSH-7.4p1-1
To: cygwin AT cygwin DOT com
Content-Type: text/plain; charset=UTF-8

Hi,

On Tue, Dec 20, 2016 at 9:44 PM, Corinna Vinschen
<corinna-cygwin AT cygwin DOT com> wrote:
> I've just updated the Cygwin version of OpenSSH to 7.4p1-1.
>
> This is primarily an upstream bugfix release.
>
> Below's the original release message.
[...]
>  * ssh(1): Add a proxy multiplexing mode to ssh(1) inspired by the
>    version in PuTTY by Simon Tatham. This allows a multiplexing
>    client to communicate with the master process using a subset of
>    the SSH packet and channels protocol over a Unix-domain socket,
>    with the main process acting as a proxy that translates channel
>    IDs, etc.  This allows multiplexing mode to run on systems that
>    lack file- descriptor passing (used by current multiplexing
>    code) and potentially, in conjunction with Unix-domain socket
>    forwarding, with the client and multiplexing master process on
>    different machines. Multiplexing proxy mode may be invoked using
>    "ssh -O proxy ..."

Looks like this could be used for connection multiplexing on Cygwin.
Since it doesn't seem to be documented I am not sure how one can test
it, but ...

with


Host *
ControlMaster auto
ControlPath ~/.ssh/master-%r@%h:%p

latte ~ > ssh i10z.com
mux_client_request_session: read from master failed: Connection reset by peer
Failed to connect to new control master

--> Fails as expected, lets retry.

latte ~ > ssh i10z.com
mux_client_request_session: read from master failed: Connection reset by peer
ControlSocket /home/ismail/.ssh/master-ismail AT i10z DOT com:22 already
exists, disabling multiplexing
Welcome to Ubuntu 16.10 (GNU/Linux 4.8.0-30-generic x86_64)

 * Documentation:  https://help.ubuntu.com
 * Management:     https://landscape.canonical.com
 * Support:        https://ubuntu.com/advantage
Last login: Tue Dec 20 23:42:56 2016 from 2a02:810d:8ac0:a3c:de8:1380:f2c2:bc79

--> Started a new session and created the master too.

latte ~ > ssh -O proxy i10z.com
Welcome to Ubuntu 16.10 (GNU/Linux 4.8.0-30-generic x86_64)

 * Documentation:  https://help.ubuntu.com
 * Management:     https://landscape.canonical.com
 * Support:        https://ubuntu.com/advantage
Last login: Tue Dec 20 23:43:02 2016 from 2a02:810d:8ac0:a3c:de8:1380:f2c2:bc79

--> Started a new session.

latte ~ > ssh -O proxy i10z.com
Last login: Tue Dec 20 23:43:06 2016 from 2a02:810d:8ac0:a3c:de8:1380:f2c2:bc79

--> Voila, it used the existing connection!

And after that it indeed seems to be using the old connection as long
as you specify -O proxy option.

Something to play with I guess.

Regards,
ismail

--
Problem reports:       http://cygwin.com/problems.html
FAQ:                   http://cygwin.com/faq/
Documentation:         http://cygwin.com/docs.html
Unsubscribe info:      http://cygwin.com/ml/#unsubscribe-simple