Re: [X2Go-User] Can x2go session be initiated from a server to listening client?

2020-04-09 Thread Stefan Baur
Am 07.04.20 um 21:16 schrieb Mike Gabriel:
> On  Mo 06 Apr 2020 19:19:58 CEST, Andrew Munn wrote:
> 
>> I'd like to initiate an x2go session from a server behind a firewall to a
>> listening client with port 22 open.  How can that be done?  thanks!
> 
> Run "ssh -R 12345:localhost:22 user@client" on the server (see man page
> of ssh client for correct usage of -R option) and open up a reverse
> tunnel from some port (e.g. 12345) on the client to port 22 on the
> server (to be more precise, localhost:22).
> 
> Then configure X2Go Client on the client to connect to "Host: localhost"
> and "Port: 12345" and you have your X2Go session ready to roll.

That's not what he asked for.  He wants a listening client, like
vncclient in "-listen" mode, and wants the server to initiate the
connection, without any manual interaction on the client side.  The only
way to approximate that behavior is starting x2goclient over the
server-initiated ssh connection, and passing the required parameters for
an autostarted session - see my more detailed reply to him.

-Stefan


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Re: [X2Go-User] Can x2go session be initiated from a server to listening client?

2020-04-07 Thread Mike Gabriel

On  Mo 06 Apr 2020 19:19:58 CEST, Andrew Munn wrote:


I'd like to initiate an x2go session from a server behind a firewall to a
listening client with port 22 open.  How can that be done?  thanks!


Run "ssh -R 12345:localhost:22 user@client" on the server (see man  
page of ssh client for correct usage of -R option) and open up a  
reverse tunnel from some port (e.g. 12345) on the client to port 22 on  
the server (to be more precise, localhost:22).


Then configure X2Go Client on the client to connect to "Host:  
localhost" and "Port: 12345" and you have your X2Go session ready to  
roll.


Mike
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Re: [X2Go-User] Can x2go session be initiated from a server to listening client?

2020-04-07 Thread Stefan Baur
Am 06.04.20 um 19:19 schrieb Andrew Munn:
> I'd like to initiate an x2go session from a server behind a firewall to a
> listening client with port 22 open.  How can that be done?  thanks!

There's no way to do that automatically.  You could ssh in to the client
and start x2goclient there, and, given a session profile that is
configured for autologon, you could pass that session profile, but it
would require that the user account you're sshing in with has
permissions to access the local X display, and you'd need to set the
DISPLAY variable accordingly.

Also, for this trick to work, you'd have to set up an SSH tunnel
pointing back at your server.

Pretty hairy, if you ask me.

What's the point of doing this?

-Stefan

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Geschäftsführer: Stefan Baur
Eichenäckerweg 10, 89081 Ulm | Registergericht Ulm, HRB 724364
Fon/Fax 0731 40 34 66-36/-35 | USt-IdNr.: DE268653243
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Re: [X2Go-User] Can x2go session be initiated from a server to listening client?

2020-04-07 Thread Johannes Töger
Maybe do some kind of SSH tunnel first?


— 
Johannes Töger

Associate Senior Lecturer
Cardiac MR Group
Department of Clinical Sciences Lund, Clinical Physiology
Lund University, Sweden

-Original Message-
From: x2go-user  On Behalf Of Ulrich Sibiller
Sent: Monday, April 6, 2020 19:45
To: Andrew Munn 
Cc: x2go users 
Subject: Re: [X2Go-User] Can x2go session be initiated from a server to 
listening client?

To my knowledge this is not possible with x2go. But I am pretty sure is 
possible by using the bare nx libs (nxagent/nxproxy. But you have to setup 
everything by hand then.

Uli

On Mon, Apr 6, 2020 at 7:20 PM Andrew Munn  wrote:
>
> I'd like to initiate an x2go session from a server behind a firewall to a 
> listening client with port 22 open.  How can that be done?  thanks!
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Re: [X2Go-User] Can x2go session be initiated from a server to listening client?

2020-04-06 Thread Ulrich Sibiller
To my knowledge this is not possible with x2go. But I am pretty sure
is possible by using the bare nx libs (nxagent/nxproxy. But you have
to setup everything by hand then.

Uli

On Mon, Apr 6, 2020 at 7:20 PM Andrew Munn  wrote:
>
> I'd like to initiate an x2go session from a server behind a firewall to a 
> listening client with port 22 open.  How can that be done?  thanks!
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