Okay, makes sense. I wanted to make sure I understood every step. BW has a more lenient policy on connections from the compute nodes because the VisIt maintainer put in the hard work of getting them to change it.
From: David E DeMarle [mailto:dave.dema...@kitware.com] Sent: Saturday, March 21, 2015 11:15 AM To: burlen Cc: paraview@paraview.org; Vanmoer, Mark W Subject: Re: [Paraview] server configuration with two factor authentication? I use a tiny executable called SocketRelay for the same purpose. We borrowed it from VisIt. On Mar 20, 2015 5:42 PM, "Burlen Loring" <burlen.lor...@gmail.com<mailto:burlen.lor...@gmail.com>> wrote: there are 2 places I used netcat. 1) ssh policy on login node only allows us to connect to ssh tunnels from localhost. using ncat there fools ssh into thinking we are connecting on localhost. I think it's dumb that we have to do this, but our sys admins refuse to make the change. The ssh option is called GatewayPorts. 2) there is a different network protocol used on the compute nodes of our cray, the mom node understands that protocol and acts like a bridge to the login node. we create the tunnel from mom to login with netcat. there are other ways to forward the connections beside netcat, but it's easy to build, install, and use, and it's fast. On 03/20/2015 02:26 PM, Vanmoer, Mark W wrote: Hi Burlen, Are you using ncat to setup those connections because of a policy (like no outside network connections allowed) or for a technical reason? Mark From: Burlen Loring [mailto:burlen.lor...@gmail.com] Sent: Thursday, March 19, 2015 4:48 PM To: Vanmoer, Mark W; David E DeMarle Cc: paraview@paraview.org<mailto:paraview@paraview.org> Subject: Re: [Paraview] server configuration with two factor authentication? Hi Mark, Yes to both. The way this could work on a simple cluster is: from the user's system which is assumed to be remote, the pvsc creates an ssh tunnel inside the xterm and calls the launch script on the compute system login node. the launch script submits the batch job. pvserver, when run in the batch script, connects back to the ssh tunnel on the login node. "client host" is the login node host name. "server port" is specified by the user in the pvsc. There's a slight complication with some Cray systems that means we need to involve a special node called the "mom" node in the tunnel. This will be clear if you see a complete example, for instance the following 3 scripts are used with NERSC's Cray Edison: pvsc<https://github.com/burlen/pvserver-configs/blob/master/pvsc/edison-unix.pvsc>, launch script<https://github.com/burlen/pvserver-configs/blob/master/servers/edison/4.3.1/start_pvserver.sh>, batch script<https://github.com/burlen/pvserver-configs/blob/master/servers/edison/4.3.1/start_pvserver.qsub>. Burlen On 03/19/2015 02:24 PM, Vanmoer, Mark W wrote: This great, thanks for sharing, guys. Using xterm would have never occurred to me. Are you setting the pvserver –client-host somehow? My old pvsc from Forge sent over the client’s hostname to the script. I tried that on Blue Waters and it works, but do I not need to actually do that? Also, are either of you setting –server-port in the launch script? From: David E DeMarle [mailto:dave.dema...@kitware.com] Sent: Thursday, March 19, 2015 1:28 PM To: Burlen Loring Cc: Vanmoer, Mark W; paraview@paraview.org<mailto:paraview@paraview.org> Subject: Re: [Paraview] server configuration with two factor authentication? I liked this bit too as the windows version 'xterm -e ssh &'. <Command exec="cmd.exe" delay="10"> <Arguments> <Argument value="/C"/> <Argument value="start"/> <Argument value="cmd.exe"/> <Argument value="/C"/> <Argument value="$SSH_EXEquot;/> Since windows isn't my first language, that took more hunting than I'ld like to admit. :) David E DeMarle Kitware, Inc. R&D Engineer 21 Corporate Drive Clifton Park, NY 12065-8662 Phone: 518-881-4909<tel:518-881-4909> On Thu, Mar 19, 2015 at 2:18 PM, Burlen Loring <burlen.lor...@gmail.com<mailto:burlen.lor...@gmail.com>> wrote: ""C:\Program Files (x86)\PuTTY\plink.exe"" so that's the secret to paths with spaces! nice, thanks for sharing that! On 03/19/2015 09:22 AM, David E DeMarle wrote: Howdy Mark, Adding to what Burlen said. You can grab pvsc examples for ORNL, ANL and NERSC via paraview->File->Connect… Fetch servers. //File->Conenct…FetchServers->Edit Sources replace with pvsc http://www.paraview.org/files/pvscWindows Kitware Inc. on windows. Mac requires XQuartz, windows requires putty. Let me know when you get it working, with your permission I'ld love to add NCSA (and everywhere else) there so that users get it by default. David E DeMarle Kitware, Inc. R&D Engineer 21 Corporate Drive Clifton Park, NY 12065-8662 Phone: 518-881-4909<tel:518-881-4909> On Thu, Mar 19, 2015 at 11:56 AM, Burlen Loring <burlen.lor...@gmail.com<mailto:burlen.lor...@gmail.com>> wrote: Hi Mark, This works without anything special if you launch in an xterm. We did this at NICS which requires both ssh authentication and rsa secure id token. Here is an example<https://github.com/burlen/pvserver-configs/blob/master/pvsc/edison-unix.pvsc> Burlen On 03/19/2015 06:50 AM, Vanmoer, Mark W wrote: Hi, is there a way to set up the server XML so that it works with two factor authentication, as in a token generator? This is for the Blue Waters machine at NCSA. What I mean is, something like how VisIt acts, which when doing the connection will prompt for the password and token. In the past, on machines without two factor auth, I’ve used http://www.paraview.org/Wiki/ParaView:Server_Configuration#Case_Eleven:_Launch_pvserver_on_a_cluster_using_PBS_-_use_reverse_connection_to_client but that requires having ssh keys set up. Thanks, Mark _______________________________________________ Powered by www.kitware.com<http://www.kitware.com> Visit other Kitware open-source projects at http://www.kitware.com/opensource/opensource.html Please keep messages on-topic and check the ParaView Wiki at: http://paraview.org/Wiki/ParaView Search the list archives at: http://markmail.org/search/?q=ParaView Follow this link to subscribe/unsubscribe: http://public.kitware.com/mailman/listinfo/paraview _______________________________________________ Powered by www.kitware.com<http://www.kitware.com> Visit other Kitware open-source projects at http://www.kitware.com/opensource/opensource.html Please keep messages on-topic and check the ParaView Wiki at: http://paraview.org/Wiki/ParaView Search the list archives at: http://markmail.org/search/?q=ParaView Follow this link to subscribe/unsubscribe: http://public.kitware.com/mailman/listinfo/paraview
_______________________________________________ Powered by www.kitware.com Visit other Kitware open-source projects at http://www.kitware.com/opensource/opensource.html Please keep messages on-topic and check the ParaView Wiki at: http://paraview.org/Wiki/ParaView Search the list archives at: http://markmail.org/search/?q=ParaView Follow this link to subscribe/unsubscribe: http://public.kitware.com/mailman/listinfo/paraview
