From owner-freebsd-stable@freebsd.org  Wed Sep 23 14:39:08 2015
Return-Path: <owner-freebsd-stable@freebsd.org>
Delivered-To: freebsd-stable@mailman.ysv.freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org
 [IPv6:2001:1900:2254:206a::19:1])
 by mailman.ysv.freebsd.org (Postfix) with ESMTP id AF498A064CD
 for <freebsd-stable@mailman.ysv.freebsd.org>;
 Wed, 23 Sep 2015 14:39:08 +0000 (UTC)
 (envelope-from snow@teardrop.org)
Received: from mailman.ysv.freebsd.org (mailman.ysv.freebsd.org
 [IPv6:2001:1900:2254:206a::50:5])
 by mx1.freebsd.org (Postfix) with ESMTP id 9B27E11D9
 for <freebsd-stable@freebsd.org>; Wed, 23 Sep 2015 14:39:08 +0000 (UTC)
 (envelope-from snow@teardrop.org)
Received: by mailman.ysv.freebsd.org (Postfix)
 id 9A581A064CC; Wed, 23 Sep 2015 14:39:08 +0000 (UTC)
Delivered-To: stable@mailman.ysv.freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org
 [IPv6:2001:1900:2254:206a::19:1])
 by mailman.ysv.freebsd.org (Postfix) with ESMTP id 99EEAA064CB
 for <stable@mailman.ysv.freebsd.org>; Wed, 23 Sep 2015 14:39:08 +0000 (UTC)
 (envelope-from snow@teardrop.org)
Received: from apollo.teardrop.org (apollo.teardrop.org [173.228.105.28])
 (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits))
 (Client did not present a certificate)
 by mx1.freebsd.org (Postfix) with ESMTPS id 88B3B11D8
 for <stable@freebsd.org>; Wed, 23 Sep 2015 14:39:08 +0000 (UTC)
 (envelope-from snow@teardrop.org)
Received: by apollo.teardrop.org (Postfix, from userid 30000)
 id BD8E66F2D2; Wed, 23 Sep 2015 14:31:33 +0000 (UTC)
Date: Wed, 23 Sep 2015 14:31:33 +0000
From: James Snow <snow@teardrop.org>
To: FreeBSD Stable ML <stable@freebsd.org>
Subject: Re: when the sshd hits the fan
Message-ID: <20150923143133.GG858@teardrop.org>
References: <56026686.8030308@norma.perm.ru>
 <8CC54339-0028-4CE4-9AAD-2248CD4E2FC9@lafn.org>
 <20150923104454.GG36682@home.opsec.eu>
 <20150923123730.GA15788@xtaz.uk>
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <20150923123730.GA15788@xtaz.uk>
User-Agent: Mutt/1.5.23 (2014-03-12)
X-BeenThere: freebsd-stable@freebsd.org
X-Mailman-Version: 2.1.20
Precedence: list
List-Id: Production branch of FreeBSD source code <freebsd-stable.freebsd.org>
List-Unsubscribe: <https://lists.freebsd.org/mailman/options/freebsd-stable>, 
 <mailto:freebsd-stable-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-stable/>
List-Post: <mailto:freebsd-stable@freebsd.org>
List-Help: <mailto:freebsd-stable-request@freebsd.org?subject=help>
List-Subscribe: <https://lists.freebsd.org/mailman/listinfo/freebsd-stable>,
 <mailto:freebsd-stable-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Wed, 23 Sep 2015 14:39:08 -0000

On Wed, Sep 23, 2015 at 01:37:30PM +0100, Matt Smith wrote:

> If this type of thing is being done on the base system sshd it would 
> also be useful to look at the port version of ssh as well? I use the 
> port and it has always annoyed me that I get constant "connection 
> refused" whilst I'm waiting for the server to fully boot up!

Tangential, but in case it's useful to anyone else:

  until ssh -o ConnectTimeout=2 $host; do sleep 1; done

I do this all the time for hosts where I'm waiting on boot. The timeouts
and connection refused messages serve as counters so I can do other
things while waiting and have an objective measure of whether or not
I've waited too long for a host to come up. Also handy is that it will
automatically reconnect on anything other than a deliberate log out.


-Snow