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Error: connection failed to resolve hostname, using a windows 10 x2goclient and a linux/Centos 7 x2gobroker
by pera 06 Apr '20

06 Apr '20

hi, I installed easily x2goserver and x2gobroker on two servers (OS Centos 7, x86_64). I tested it last week. It worked really well with a Linux x2goclient (fedora 31, x86_64)using : - a connection to the server through an ssh proxy with password. - a connection using a session from a x2gobroker server with the same login/password/server. I tried the same tests with a Windows 10 pro x2goclient. The first test, a connection to the server through an ssh proxy works fine. But, when my x2goclient use the session from the x2gobroker (same x2goserver/use/password), the connection failed. My client write the following error: failed to resolve the hostname ... (x2gserver) In fact, the x2goclient seems to try a direct ssh connection to the x2goserver without using the ssh gateway offers by my x2gobroker server. This case is fine with a Linux client. Is there a problem in my network windows configuration ? Client version is one of the last windows release (4.1.2..). I tried several versions. X2goserver and X2gobroker versions are the last from the official x2go repositories for debian/centos (broker 0.0.4.1-1 , server4.1.0.3) My command to excute x2cgoclient in windows 10 powershell "C:\Program Files (x86)\x2goclient\x2goclient.debug.exe" --broker-url="ssh://x2go-gateway.domain.fr:/usr/bin/x2gobroker --mode SSH" --add-to-known-hosts --portable --debug --libssh-debug --libssh-packetlog --disable-pulse --link=adsl X2go-gateway.domain.fr is an x2gobroker server, but also a ssh gateway to acces x2goservers on private network. You will find debug messages from the file attachment. I may just be too tired to see where is the error... Any advice, help are welcome.

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(no subject)
by Richard Beare 02 Apr '20

02 Apr '20

Apologies - accidentally sent before completing Hi, I have a working installation of x2go, but there is some ugliness about the setup that I'd like to reduce. Any advice welcome. Here's how it looks at the moment. 1) vpn connection to the institute. 2) ssh tunnel to the workstation from the laptop 3) x2go connected to the local tunnel port This works, but we now have 3 layers of encyption. The reason for not pointing x2go directly at the w orkstation is the use of PaloAltoNetworking appliances within the institution. These do a man-in-the-middle break of ssh connections and lead to the following error from x2go: kex error : no match for method kex algos: server [diffie-hellman-group-exchange-sha256,diffie-hellman-group-exchange-sha1], client [curve25519-sha256@libssh.org,ecdh-sha2-nistp256,ecdh-sha2-nistp384,ecdh-sha2-nistp521,diffie-hellman-group14-sha1,diffie-hellman-group1-sha1] A direct ssh login works, but always falls back to a password. Is there any configuration option possible to have x2go/libssh handle the setup in the same way that regular ssh does? That would eliminate one encryption layer. Other recommendations greatly appreciated too. Thanks Richard Beare Team Leader (Computational Methods Group) Developmental Imaging Murdoch Children's Research Institute The Royal Children's Hospital Flemington Road Parkville Victoria 3052 Australia T 8341 6403 E Richard.Beare(a)mcri.edu.au<mailto:richard.beare@mcri.edu.au> www.mcri.edu.au Developmental Imaging Software<http://developmentalimagingmcri.github.io/> Disclaimer This e-mail and any attachments to it (the "Communication") are, unless otherwise stated, confidential, may contain copyright material and is for the use only of the intended recipient. If you receive the Communication in error, please notify the sender immediately by return e-mail, delete the Communication and the return e-mail, and do not read, copy, retransmit or otherwise deal with it. Any views expressed in the Communication are those of the individual sender only, unless expressly stated to be those of Murdoch Children’s Research Institute (MCRI) ABN 21 006 566 972 or any of its related entities. MCRI does not accept liability in connection with the integrity of or errors in the Communication, computer virus, data corruption, interference or delay arising from or in respect of the Communication.

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x2gokdrive and windows client
by Михайло Падалка 02 Apr '20

02 Apr '20

Yesterday I updated X2go on my Debian (4.1.0.4-0x2go1.2~git20200228.1815+9.heuler.1) and windows client (last stable from X2go download page), and saw there is an option to use x2gokdrive. I turned it on and tried to connect - but nothing worked, no desktop, no any errors etc. Is it supposed to work on windows client? -- З повагою, Михайло

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Resizing remote desktop behavior
by Kees Bakker 02 Apr '20

02 Apr '20

Hey, My setup is with a Ubuntu client and a Linux server and two monitors local. The session is MATE. Xinerama extension enabled. After connection the desktop is created and I have a window (not full screen) on one monitor. Then I stretch the remote desktop horizontally, by grabbing the right side (not the corner). I want it to stretch it occupying my two monitors, while leaving a little bit on space on all sides. The Xinerama extension works quite well. The panels stay on one (local) monitor. Cool feature! What troubles me is that the height is expanded at the same time while doing the horizontal stretch. Sometimes the bottom edge even disappears off-screen. There really is something funny with resizing that it keeps moving the bottom. Even when I move the desktop window as a whole by dragging the top bar, as you would normally move windows in Ubuntu Gnome. It seems to have a strong preference to make the remote height the same as the height of my local monitor. What is extra annoying is that working remotely (thanks to X2GO!) the feedback from the remote is not immediate. So it jumps to where you don't want it to be, before you have time to react. So, the question is, how do I stop it from snapping to the local monitor screen edges? -- Kees

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configure x2go for servers inside a network with PaloAltoNetworking firewalls
by Richard Beare 01 Apr '20

01 Apr '20

Hi, I have a working installation of x2go, but there is some ugliness about the setup that I'd like to reduce. Any advice welcome. Here's how it looks at the moment. 1) vpn connection to the institute. 2) ssh tunnel to the workstation from the laptop 3) x2go connected to the local tunnel port This works, but we now have 3 layers of encyption. The reason for not pointing x2go directly at the w orkstation is the use of PaloAltoNetworking appliances within the institution. These do a man-in-the-middle break of ssh connections and lead to the following error from x2go: The PaloAltoNetworking installation stops a direct x2go connection to the workstation Richard Beare Team Leader (Computational Methods Group) Developmental Imaging Murdoch Children's Research Institute The Royal Children's Hospital Flemington Road Parkville Victoria 3052 Australia T 8341 6403 E Richard.Beare(a)mcri.edu.au<mailto:richard.beare@mcri.edu.au> www.mcri.edu.au Developmental Imaging Software<http://developmentalimagingmcri.github.io/> Disclaimer This e-mail and any attachments to it (the "Communication") are, unless otherwise stated, confidential, may contain copyright material and is for the use only of the intended recipient. If you receive the Communication in error, please notify the sender immediately by return e-mail, delete the Communication and the return e-mail, and do not read, copy, retransmit or otherwise deal with it. Any views expressed in the Communication are those of the individual sender only, unless expressly stated to be those of Murdoch Children’s Research Institute (MCRI) ABN 21 006 566 972 or any of its related entities. MCRI does not accept liability in connection with the integrity of or errors in the Communication, computer virus, data corruption, interference or delay arising from or in respect of the Communication.

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Deactivate IPv6 in x2goclient
by Christoph Pleger 30 Mar '20

30 Mar '20

Hello, I have a non-working session defined in x2goclient and I guess that the reason why it is not working is that the client tries to connect to the server using IPv6. While the server does have a working IPv6 address, from my home computer I first have to use OpenVPN to get an (IPv4) address from within my organization's address space and only that I can login to the server. When using ssh from the command line, I use '-4" to tell that IPv6 shall not be tried; is there also a way to tell x2goclient to only try IPv4? Regards Christoph

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Can't connect to server with user 'A' but with user 'B'
by Henrik Schmidt 24 Mar '20

24 Mar '20

I'm using x2go server 4.0.1.20 with nxagent 3.5.0.32 on OpenSuse tumbleweed. I login with x2go client 4.1.2.2 on Windows 10. With User 'B' I can connect fine and the XCFE seesion is started properly. With User 'A' I get an error on the client: "The remote proxy closed the connection while negotiating the session. This may be due to wrong authentication credentials passed to the server." On the server the session.log is: Info: Agent running with pid '17266'. Session: Starting session at 'Fri Mar 20 13:38:52 2020'. Info: Proxy running in server mode with pid '17266'. Info: Waiting for connection from 'localhost' on port '30958'. Info: Aborting the procedure due to signal '1'. Error: Aborting session with 'Unable to open display 'nx/nx,options=/tmp/.x2go-hbs/C-hbs-58-15 84707931_stDXFCE_dp32/options:58''. Session: Aborting session at 'Fri Mar 20 13:39:52 2020'. Session: Session aborted at 'Fri Mar 20 13:39:52 2020'. Both user use the identical x2go session settings on the client and I tried both passwort and ssh key authentication for user 'A'. The password is working fine as I can login as user 'A' with a ssh client (Bitvise). What are possible causes that the two users behave diffently? I tried identical .profile files for both users but this did not help. Any tips? Thanks Henrik

3 5

kde bug
by Bilinmek Istemiyor 24 Mar '20

24 Mar '20

Hello, I have been searching for a remote desktop solution to manage two manjaro linux machines at my home, after fiddling with vnc, I have come across to x2go, I am pretty impressed with the setup, and I thank you all who has contributed this software.. I would like to report one issue. In x2go client, there is an option of selecting desktop environments. I am using KDE in both machines. When I select KDE, the connection can not be established since startkde fails. KDE has changed startkde to startplasma-x11. I have tried to circumvent this problem by symbolic linking startkde to startplama-x11 by symbolic linking in the same directory which is /usr/bin. However this failed. I gave up KDE option. I have selected Custom Destop option and entered startplasma-x11 as the command which worked. I believe the KDE option must be updated accordion to new command.. Another issue is, the windows' menu fonts are exceptionally big even though the contents seem proportional.. I do not know if this is relevant to the missing of some options... Native connection with monitor does not have this issue. Best regards...

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windows x2go client nable to select monitor to view
by gian sisal 19 Mar '20

19 Mar '20

Hi everyone, Is there a way to connect to a multi-display system (centOS) via X2Go (windows client) and select a single display to show? I'm using windows X2Go client v 4.1.2.0 (Qt- 4.8.6) to connect to a remote system (centOS 7.5 ****) with 4 physical displays, when I connect, I can see in full screen mode the entire graphical remote desktop (4 virtual remote screens stretched into my physical monitor), I'd like to know if is there a way to select one of these displays instead of all. In case, is there a Linux client version that allows me to do that? or a new windows client version (not found yet while searching on the net). Thanks in advance. Regards. G ****:(on remote Linux system) x2goversion : 4.1.0.3 : 4.1.0.3 : 4.1.0.3 : 3.5.99.17 : 4.1.0.3

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pxeboot in Debian Buster (not booting, which pxelinux.0?)
by Luciano Andino 02 Mar '20

02 Mar '20

Hello, I'm x2go user since some years ago. Now trying to install a new PXEBOOT server. What I did: 1) Updated x2go sources according: https://wiki.x2go.org/doku.php/wiki:repositories:debian 2) Then continued building system with instructions https://wiki.x2go.org/doku.php/doc:howto:tce#building_your_own_x2go-tce_ima… $ apt-get install genisoimage git-core live-build live-config-doc live-manual-html live-boot-doc lsb-release netcat-traditional $ apt-get install apt-cacher-ng $ apt-get install qemu-user-static # dpkg -l|grep x2go ii x2go-keyring 2019.08.20+git20190820.118+10.main.1 all GnuPG keys of all X2Go developers and the X2Go archive rc x2gothinclient-management 1.5.0.1-0x2go2+git20191129.725+10.main.1 all Management tools for X2Go Thin Client chroot server $ mkdir /usr/local/x2gobuild ; cd /usr/local/x2gobuild # then created the three files patchscript/x2go-tce-build/x2go-tce-config # applied patchscript and started to build root@pxeserver:/usr/local/x2gobuild# ./x2go-tce-build .... cryptsetup: WARNING: Couldn't determine root device cryptsetup: ERROR: Couldn't resolve device /dev/sda3 cryptsetup: WARNING: The initramfs image may not contain cryptsetup binaries nor crypto modules. If that's on purpose, you may want to uninstall the 'cryptsetup-initramfs' package in order to disable the cryptsetup initramfs integration and avoid this warning. .... Build is done: './live-build-x2go-20200227200355-netboot-amd64-openbox-magic-pixel-workaround-buster' 641641 bloques [2020-02-27 20:20:07] lb clean P: Cleaning chroot root@pxeserver:/usr/local/x2gobuild# 3) * http server installed. Both x2go-tce.sessions & x2go-tce-filesystem.squashfs are accesible through niginx. root@pxeserver:/usr/local/x2gobuild# cp live-build-x2go-20200227200355-netboot-amd64-openbox-magic-pixel-workaround-buster/x2go-tce-filesystem.squashfs /var/www/html/x2go-tce/ * dhcp server installed and working. 4) Netbooting 4.1) atftp server working 4.2) Copied x2go-tce-vmlinuz and x2go-tce-initrd.img to /srv/tftp/x2go-tce 4.3) created in tftproot "pxelinux.cfg/x2go-tce" (file reference to x2go-tce/vmlinuz and x2go-tce/initrd.img instead, changed that) 4.4) looking for a pxelinux.0 file: 4.4.1) root@pxeserver :/usr/local/x2gobuild/live-build-x2go-20200227200355-netboot-amd64-openbox-magic-pixel-workaround-buster# cp live-image-amd64.netboot.tar /srv/tftp/ root@pxeserver:/usr/local/x2gobuild/live-build-x2go-20200227200355-netboot-amd64-openbox-magic-pixel-workaround-buster# tar xvf live-image-amd64.netboot.tar # copied tftpboot directory to tftproot directory root@pxeserver:/srv/tftp# ls advanced.cfg install.cfg libcom32.c32 libmenu.c32 live menu.cfg pxelinux.cfg stdmenu.cfg x2go-tce hdt.c32 ldlinux.c32 libgpl.c32 libutil.c32 live.cfg pxelinux.0 splash.png vesamenu.c32 ---> Result, system does not boot (ethernet driver fails) or 4.4.2) Using old x2gothinclient_preptftpboot script ---> System boots but login screen offers to connect to an X server somewhere in the Internet (seems is not using sessions file) Thanks in advance, -- Luciano Andino Master en Ing. de Software - BMSTU Ing. en Sistemas de Información - UTN FRSF

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