From owner-freebsd-questions@FreeBSD.ORG Mon Oct 20 20:50:09 2008 Return-Path: Delivered-To: freebsd-questions@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 0A2C31065674 for ; Mon, 20 Oct 2008 20:50:09 +0000 (UTC) (envelope-from jalmberg@identry.com) Received: from mx1.identry.com (on.identry.com [66.111.0.194]) by mx1.freebsd.org (Postfix) with ESMTP id 85D2B8FC20 for ; Mon, 20 Oct 2008 20:50:08 +0000 (UTC) (envelope-from jalmberg@identry.com) Received: (qmail 5635 invoked by uid 89); 20 Oct 2008 20:50:07 -0000 Received: from unknown (HELO ?192.168.1.110?) (jalmberg@75.127.142.66) by mx1.identry.com with ESMTPA; 20 Oct 2008 20:50:07 -0000 Mime-Version: 1.0 (Apple Message framework v753.1) To: freebsd-questions@freebsd.org Message-Id: <1479DAD4-A72B-415E-B8B0-FDEA810161ED@identry.com> References: From: John Almberg Date: Mon, 20 Oct 2008 16:50:05 -0400 X-Mailer: Apple Mail (2.753.1) Content-Type: text/plain; charset=US-ASCII; delsp=yes; format=flowed Content-Transfer-Encoding: 7bit X-Content-Filtered-By: Mailman/MimeDel 2.1.5 Subject: Fwd: mysql connection through ssl tunnel X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 20 Oct 2008 20:50:09 -0000 >> >> After a few hours of work today, I have all this working >> perfectly. I'm >> using autossh to automatically create and monitor the ssh tunnel, >> and I >> can make mysql connections through the tunnel with no problems. >> Very cool. >> >> And that's through PF firewalls on both machines, which added >> flavor to >> the exercise ;-) >> >> One question... and maybe this is a general, philosophical >> question... >> >> If autossh watches over my ssh tunnel, who or what watches over >> autossh? >> >> As a related question, how can I make autossh start automatically >> after >> a reboot? At the moment, I start autossh from the command line, >> like so: >> >>> autossh -M 20000 -fNg -L 33006:127.0.0.1:3306 admin@dbs.example.com >> >> There doesn't seem to be an rc.d file for autossh... Do I have to >> figure >> out how to make one? >> > > You can do this all by not using autossh at all: let init watch and > re-establish your ssh tunnel: > > This is in my /etc/ttys (wrapped for readability): > > ttyv8 "/usr/bin/ssh -l syslogng -nNTx -R 3306:local.domain.tld:3306 > remote.domain.tld >/dev/null 2>&1" unknown on > > I let my central machine control the tunnel, not the sending one. H'mmm... This is new territory for me. I've just read some of the man pages and a few pages in Absolute BSD, and I guess I sort of understand what this does. I'm trying to grasp the connection between virtual terminals and this SSH tunnel... I guess my main question is, if I start the tunnel with this method, will I be able to access mysql in 'the usual way'? The following works with my autossh tunnel: mysql -h127.0.0.1 -P33006 -uuser -ppassword db So, if using the /etc/ttys file is equivalent, and I make the connection on the database server, rather than the client server, then I guess my ttys file should look like this (my ttyv8 is already used... I am guessing I should use the next one down): ttyv7 "/usr/bin/ssh -l admin -nNTx -R 3306:127.0.0.1:33006 example.com >/dev/null 2>&1" unknown on Where 'admin' is the user I am logging into on the remote machine, and 'example.com' is the hostname of the remote machine. I guess equivalent to the following? ttyv7 "/usr/bin/ssh -nNTx -R 3306:127.0.0.1:33006 admin@example.com >/dev/null 2>&1" unknown on Port 33006 is not a typo. There are databases running on both machines, so I need to use a different port for the tunnel. And as far as I can tell, I reload /etc/ttys with 'kill -1 1'. This looks dangerous... -- John ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Websites and Marketing for On-line Collectible Dealers ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Identry, LLC John Almberg (631) 546-5079 jalmberg@identry.com www.identry.com ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~