Re: [X2Go-Dev] Bug#1520: Proxy-Server - SSH - strong Cipher crash x2Go-Client

[Ulrich Sibiller]

It is probably required to recompile x2goclient with a current libssh.
As a workaround you can try to build a tunnel via the jumphost with
the window ssh and connect x2goclient to that tunnel instead of using
a proxy in the x2goclient configuration.

On Thu, Jan 14, 2021 at 4:25 PM Stefan Baur  wrote:
>
> Am 14.01.21 um 08:47 schrieb marian.schwa...@dlr.de:
> > I hope I provided all needed information for you. Let me know if this can 
> > be patched, or does our Company need to search for other solution.
>
> Sure sounds like something that *can* be patched.  If you want to
> expedite patching, feel free to sponsor the patch by contracting one of
> the companies providing commercial X2Go support:
> 
>
> Kind Regards,
> Stefan Baur
>
> --
> BAUR-ITCS UG (haftungsbeschränkt)
> 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-Dev] Bug#1520: Proxy-Server - SSH - strong Cipher crash x2Go-Client

[Stefan Baur]

Am 14.01.21 um 08:47 schrieb marian.schwa...@dlr.de:
> I hope I provided all needed information for you. Let me know if this can be 
> patched, or does our Company need to search for other solution.

Sure sounds like something that *can* be patched.  If you want to
expedite patching, feel free to sponsor the patch by contracting one of
the companies providing commercial X2Go support:


Kind Regards,
Stefan Baur

-- 
BAUR-ITCS UG (haftungsbeschränkt)
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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[X2Go-Dev] Bug#1520: Proxy-Server - SSH - strong Cipher crash x2Go-Client

[Marian.Schwarcz]

Package: x2goClient
Version: 4.1.2.2-2020.02.13

Host-System: Windows 10, und Windows Server 2012 R2 (German Language)
Installations-Typ: Recommended (Default)

*** Problem Description ***
When using x2GoClient via jumpserver (as SSH-Proxy-Server), then is X2GoClient 
automatic closed (without any Information). Problem are the SSH-Strong-Ciphers, 
which are configured in SSHd on Jumpserver. Strong Ciphers => x2GoClient 
crashed. If default Ciphers => x2GoClient and connection works.

*** X2GoClient - Configuration ***
Sitzungsname: test
Pfad: /
Host: ziel-server
Login: test_ye
SSH-Port: 22

Proxy-Server für SSH-Verbindung verwenden
SSH
Host: jumpserver
Port: 22
Gleiche Anmeldung wie für X2Go-Server
Gleiches Kennwort wie für X2Go-Server

XFCE

*** Jumpserver Configuration) ***
Jumpserver SSHd Config: /etc/ssh/sshd_config  (CentOS 7)
Ciphers aes128-ctr,aes192-ctr,aes256-ctr

The ciphers are used for strong Encryption. Then access from x2GoClient via 
jumpserver cannot handle this.
--

When the Cipher-Restriction is not configured:
Jumpserver SSHd Confg: (CentOS 7)
#Ciphers aes128-ctr,aes192-ctr,aes256-ctr

then the connection from x2GoClient via jumpserver to Destination X2Go-Server 
does work.


I hope I provided all needed information for you. Let me know if this can be 
patched, or does our Company need to search for other solution.
Thank you.

Best regards,
Marián Schwarcz

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[X2Go-Dev] Bug#1518: x2go is aborted: unable to open display

[simona bellavista]

Package: X2Go Client
Version:  4.1.2.2

I work on OSX client. I try to connect to a remote server, and the
connection fails. I was able to connect until 3 days ago, I did not change
anything that I can remember. I get the following error message:

Error: Aborting session with 'Unable to open display
'nx/nx,options=/tmp/.x2go-user/C-user-173-1610379165_stDXFCE_dp32/options:173''.

Session: Aborting session at 'Mon Jan 11 16:33:18 2021'.

Session: Session aborted at 'Mon Jan 11 16:33:18 2021'.

Loop: WARNING! Signals were not blocked in process with pid '30901'.

Warning: Signals were not blocked in process with pid '30901'.
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