[Paraview] A Forward Connection Over two ssh Tunnel

Mon Aug 18 23:56:47 EDT 2014

Very cool! Thanks for sharing, Axel. It will be nice to link this page
from the Wiki as a reference/example, if that's okay.

Utkarsh

On Mon, Aug 18, 2014 at 6:12 PM, Huebl, Axel <a.huebl at hzdr.de> wrote:
> Dear Ehsan,
>
> I use a similar setup as Burlen, tunneling twice over a login node to
> our cluster's head node.
>
> It also needs `GatewayPorts clientspecified` in the head node's
> sshd_config to work with maximum comfort.
> Feel free to check our wiki:
>
> https://github.com/ComputationalRadiationPhysics/picongpu/wiki/ParaView
>
> Best,
> Axel
>
> On 18.08.2014 22:43, Burlen Loring wrote:
>> Hi Utkarsh,
>>
>> Sure I can do that.
>>
>> Burlen
>>
>> On 08/18/2014 01:36 PM, Utkarsh Ayachit wrote:
>>> Burlen,
>>>
>>> Very cool. When you get the chance, mind updating the Wiki?
>>>
>>> Thanks
>>> Utkarsh
>>>
>>> On Mon, Aug 18, 2014 at 12:37 PM, Burlen Loring <bloring at lbl.gov> wrote:
>>>> Hi Ehsan,
>>>>
>>>> As Utkarsh says you need to use a reverse connection. I suggest ncat
>>>> instead
>>>> of portfwd because portfwd is a long dead project with no support and
>>>> it's
>>>> failed to compile on some systems I used. Here's a schematic of the
>>>> setup
>>>>
>>>> [work station]              [  login node    ]      [ compute node ]
>>>> [  paraview  ]<-- ssh -R --<[ ncat + ncat -l ]<-----[ pvserver -rc ]
>>>>
>>>> in more detail:
>>>> in your pvsc on the client
>>>> ssh -R ${PORT}:localhost:${PORT} ${LOGIN_HOST} ...
>>>>
>>>> on the login node in a shell script referenced by the client's pvsc:
>>>> let LOGIN_PORT=${PORT}+1
>>>> ncat -l ${LOGIN_HOST} ${LOGIN_PORT} --sh-exec="ncat localhost $PORT" &
>>>> qsub ...
>>>>
>>>> on the compute node in your batch script
>>>> mpirun ... pvserver --reverse-connection --client-host ${LOGIN_HOST}
>>>> --server-port ${LOGIN_PORT} ...
>>>>
>>>> You could skip ncat if you have control over the sshd config, you
>>>> need to
>>>> enable GatewayPorts.
>>>>
>>>> Burlen
>>>>
>>>>
>>>> On 08/18/2014 08:18 AM, Utkarsh Ayachit wrote:
>>>>
>>>> It does boil down to using reverse connection and setting up recursive
>>>> tunnels so that the pvserver and tunnel back to the client. See the
>>>> following on the need for portfwd and how it could potentially be
>>>> helpful here.
>>>>
>>>> http://www.paraview.org/Wiki/Reverse_connection_and_port_forwarding#Reverse_Connection_over_a_Reverse_ssh_Tunnel_with_portfwd
>>>>
>>>>
>>>> On Mon, Aug 18, 2014 at 11:15 AM, ehsan saei <ehsan.saei at gmail.com>
>>>> wrote:
>>>>
>>>> Dear Utkarsh,
>>>> Thanks for your respond. I tried the section : " A forward connection
>>>> over
>>>> an ssh tunnel "
>>>> but it doesn't work. The problem is that I have to ssh to one system and
>>>> then ssh to the cluster again and finally I can submit a job. Do you
>>>> have
>>>> any other suggestions?
>>>>
>>>> thanks in advance,
>>>> Ehsan
>>>>
>>>>
>>>> On Mon, Aug 18, 2014 at 4:29 PM, Utkarsh Ayachit
>>>> <utkarsh.ayachit at kitware.com> wrote:
>>>>
>>>> This may be of help:
>>>> http://www.paraview.org/Wiki/Reverse_connection_and_port_forwarding
>>>>
>>>> Utkarsh
>>>>
>>>> On Mon, Aug 18, 2014 at 5:52 AM, ehsan saei <ehsan.saei at gmail.com>
>>>> wrote:
>>>>
>>>> Hi all,
>>>>
>>>> I'm new to paraview. I try to run pvserver on a cluster. The problem is
>>>> that
>>>> I need to ssh twice to get access to the cluster. To use pvserver I
>>>> submit a
>>>> job on the cluster and then I run pvserver using the command
>>>> "mpirun -np 12 pvserver"
>>>> then I pick the name and port from terminal and use it in paraview
>>>> client.
>>>> but paraview can't find the pvserver. Is there any way to establish a
>>>> connection via these two ssh tunnels?
>>>>
>>>> Thanks in advance,
>>>> Ehsan
>>>>
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>>
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>
> --
>
> Axel Huebl
> Diploma Student
> Phone +49 351 260 3582
> https://www.hzdr.de/crp
> Computational Radiation Physics
> Laser Particle Acceleration Division
> Helmholtz-Zentrum Dresden - Rossendorf e.V.
>
> Bautzner Landstrasse 400, 01328 Dresden
> POB 510119, D-01314 Dresden
> Vorstand: Prof. Dr.Dr.h.c. R. Sauerbrey
>           Prof. Dr.Dr.h.c. P. Joehnk
> VR 1693 beim Amtsgericht Dresden
>
>
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