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[Xgrid] Re: Xgrid-users Digest, Vol 6, Issue 9 Dr.-Ing.V.Sassmannshausen Tue Feb 03 14:00:25 2009

I really would like to unsubscribe.

I have used the link, but I get this e-mails with no stop at all.

Am 03.02.2009 um 12:12 schrieb [EMAIL PROTECTED]:

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Today's Topics:

   1. xgrid ssh tunnel (Joachim Moortgat)
   2. Re: xgridctl as root (Ernest N. Prabhakar, Ph.D.)


Message: 1
Date: Tue, 3 Feb 2009 10:38:04 -0800
From: Joachim Moortgat <[EMAIL PROTECTED]>
Subject: [Xgrid] xgrid ssh tunnel
Content-Type: text/plain; charset=ISO-8859-1

I wonder if anyone could give me any suggestions to set up a ssh
tunnel in order to connect a remote agent to my local xgrid. Let me
explain the set-up. I have a working little test xgrid in my office,
consisting of 1 iMac running the controller plus client and agents on
its 2 cores. Connected to it is a macbook pro running agents on its 2
cores and connected via ethernet over the local network. All
connections are password protected. Next I would like to connect other
agents over the internet. However, my xgrid described above is on the
local network, behind a firewall and can't be accessed from the
outside world. I do have access and control over my agents though,
including their firewall and port forwarding. So what I need to do
(unless someone has another suggestion) is to ssh OUT to my agents,
tunneling the xgrid 4111 port (and others?). I did find some
suggestions in the archives of this list to go the other way, i.e. ssh
tunneling from the agent to the controller, but not this way around.
I tried connecting to the agent computer (remote.agent.org) like this:

ssh -L 4111:remote.agent.org:4111 -l meuser -N remote.agent.org

but it doesn't work (error is:
bind: Address already in use
channel_setup_fwd_listener: cannot listen to port: 4111
Could not request local forwarding. )
maybe because the computer that runs the controller also runs 2 agents
on itself. I did set up the agent to connect to localhost for the

Does anyone know how to do this?


Message: 2
Date: Tue, 03 Feb 2009 11:35:06 -0800
From: "Ernest N. Prabhakar, Ph.D." <[EMAIL PROTECTED]>
Subject: Re: [Xgrid] xgridctl as root
To: Apple Xgrid list <[EMAIL PROTECTED]>
Content-Type: text/plain; delsp=yes; charset=us-ascii; format=flowed

Ed Baskerville wrote:
So, just to clarify, when you run xgridctl using the root user, it
successfully runs (because you have root privileges) but returns
that the controller is not running because it talks to a root-user
launchd rather than the system launchd? Does that sound right?

Not quite.  When you run as the root user on Leopard via "su root" or
a setuid-root binary, your mach bootstrap namespace does NOT change at
all, so you are actually talking to the original user's launchd rather
than the system launchd.

-- Ernie P.


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